- x2go-user - X2Go ListServ

X2Go and a complex command
by James M. Pulver 01 Nov '17

01 Nov '17

I'm having some issue with a session command. I'm trying to launch x2go and have it run xterm -e 'qrsh -q interactive.q -pe sge_pe 1 -l m_core=1 /nfs/opt/ImageJ/ImageJ' This command works when run manually, and other commands like xterm -e 'qrsh -q interactive.q -pe sge_pe 1 -l m_core=1 matlab -desktop' work also. I get an error from x2go saying Connection Failed bash: -c: line 0: unexpected EOF while looking for matching `" bash: -c: line1: syntax error: unexpected end of file I got this with 4.0.2.0 with sh substituted for bash above, then tried 4.1.0.0 on Windows 7 x64. Any ideas? -- James Pulver CLASSE Computer Group Cornell University

2 1

Two problems: Right click delayed and audio not working
by Michael Eager 28 Oct '17

28 Oct '17

Both of these problems appeared a few days ago in what used to be a functioning X2go client/server. The server is CentOS 7, x2goserver-4.0.1.20, the client is Fedora 25, x2goclient-4.1.0.0. Previously, when I started a KDE session, the startup music would play and I was able to play sound files and have the audio on the client. Now this does not work. Running mplayer gives messages saying that it failed to initialize audio driver pulse. When I right-click on a button in email or on a web page to display a menu, the application hangs for maybe 20 seconds before the menu appears. A left-click on a menu item also has a long delay. This happens with both Thunderbird and Firefox. I can run Thunderbird remotely using "ssh -X" and none of this behavior occurs. One odd thing is that this was happening a couple weeks ago and then disappeared. I don't know what caused the problem before or what changed to cure it. Any ideas? -- Michael Eager eager(a)eagerm.com 1960 Park Blvd., Palo Alto, CA 94306

1 0

Firefox Browser Performance via X2Go - and a call for help on behalf of X2Go and Pale Moon
by Stefan Baur 28 Oct '17

28 Oct '17

[crossposting this to x2go-dev/x2go-user; please reply to x2go-dev only] Hi $LIST, there have been numerous complaints in the past about Firefox' lack of performance when used in an X2Go session, especially over WAN connections. During some extensive testing and comparison of browser engines, we discovered that setting the following three values in about:config bring some improvement to current Firefox versions: gfx.xrender.enabled (boolean) true gfx.canvas.azure.backends (string) cairo gfx.content.azure.backends (string) cairo Note that xrender support is going away soon. What we also discovered is that the KDE3-fork Trinity <https://www.trinitydesktop.org/> brings a Konqueror browser version that performs way better than Firefox, even with the above three parameters enabled. Next, we discovered an actively maintained fork of Firefox 28 - named Pale Moon <https://www.palemoon.org/>. This gives comparable performance to Trinity-Konqueror, with the advantage of being way closer to Firefox in both UI design and codebase, so pages that work fine in Firefox should work fine in Pale Moon as well - something I wouldn't want to take for granted with Trinity-Konqueror. I have uploaded two demo videos showing the performance of Firefox (with XRENDER only, not cairo) vs. Trinity-Konqueror and vs. Pale Moon: Firefox (left) vs. TDE-Konqueror (right): https://youtu.be/GfTVhX0UT8M Firefox (left) vs. Pale Moon (right): https://youtu.be/kilDivhvMZw I decided to talk to the Pale Moon developers on IRC and it turns out they plan to revamp their core component <http://personal.mattatobin.com/image/capture/c4d873f0-9048-4523-8abf-ba5763…> some time next year ("port Pale Moon to the up and coming Unified XUL Platform from the current platform code we have now"). The one person I talked to in particular, Matt A. Tobin, suggested that the drop in performance came with the drop of support for GTK2. The Pale Moon developers would be interested in keeping GTK2 support even in their new core component, but would need some cash and especially some additional manpower in the form of skilled coders. So this is a call for help: - If you're a company that uses X2Go and is interested in supporting Pale Moon development, either financially or by assigning your own coders to the project, please let me know. - If you're a professional coder interested in working on Pale Moon as long as you get paid for it, please let me know. - If you're a volunteer coder that wants to work on Pale Moon just for the greater good of all, please let me know too. -> I will be coordinating all efforts from the X2Go side of things. Any questions, suggestions, comments, etc. please follow up either in X2Go-Dev or via PM. Kind Regards, Stefan Baur -- BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243

1 0

New guy, new OBS repo and some issues
by Hans-Peter Jansen 27 Oct '17

27 Oct '17

Hello everybody, after noticing this wonderful project, I started with a new openSUSE Build Service repo for x2go today: https://build.opensuse.org/project/show/home:frispete:RemoteDesktop:x2go since RemoteDesktop:x2go is somewhat orphaned and suffers from serious bit rot in some auxiliary packages. While at it, I've updated x2goclient to 4.1.0.1 already, and plan to update the other packages, that saw new releases, soon. Being a heavy remote user of all kinds (ssh, vnc, rdp), this project is a perfect fit. I never got NX to cooperate nicely, but always thought, that the basic concepts are sound. Anyway, I was able to install the x2goserver and x2goplasmabindings packages on a remote system (Leap 42.3 Virtualbox VM on a 42.3 host), and successfully connect to it with the x2goclient package, reaching out a nice and fresh KDE desktop. So far for the good news. After login, powerdevil crashes with signal 6 (related to non existing DimDisplay action). This in turn results in a drkonqi crash (sig 11). Probably related to these, the X2Go PLasma Bindings failed to remove the shut down and reboot actions in the K menu. Immediately logging out results in a ksmserver crash, that effectively prevents a successful log out, hence the session can only be terminated the hard way from the X2Go client UI. Parallel ssh sessions to the server appear locked at some point (not immediately after login, but somewhat later on). There are some konsole related issues, resulting in a delay by 1 to 6 seconds from any pressed key. Interestingly, xterm doesn't suffer from this behaviour. Are these effects known already? Any ideas/mitigations/workarounds? The "unboxing" experience is very nice already. The performance is great. Filing these issues as bugs starts with the question, what package they relate to? Are you guys still using a patched libssh package? Thanks in advance. Cheers, Pete

4 3

Ubuntu pulseaudio configuration
by Jamie Allen 27 Oct '17

27 Oct '17

Greetings I am using X2GO to access and Ubuntu 17 server running Mate. I am having mixed success with the redirected audio to the client (which is running pulseaudio). I can aplay soundfile.wav and it successfully plays on the client. However, pavucontrol on the server core dumps, and any application other than aplay (eg mpg123) fails to send the audio (with no error reported at the server end). I wonder if anyone could advise on the correct Ubuntu pulseaudio configuration.... or has experienced this strange partly-working situation? With grateful thanks, Jamie

1 0

X2goClient with SSH key
by Jean Tinguely 24 Oct '17

24 Oct '17

Hello, I follow this tutoriel https://wiki.x2go.org/doku.php/wiki:advanced:authentication:passwordless-ssh but it does not work. I'm on Ubunut 16.04.3 LTS with kernel 4.4.0-97-generic. When I make a ssh user(a)my.server.com it's ok, I reach my server and connect immediatly. But when I use X2GoClient then I have a message : "Connection refused". I put the path of my private key on the field path for the sessions. I don't understand. Where did I miss a step? Best regards. -- Jean Tinguely Awais Stagiaire why! open computing SA Rte de Renens 4 CH-1008 Prilly Phone +41 21 661 22 22 <+41%2021%20661%2022%2022> Mobile +41 76 227 01 32 <+41%2076%20227%2001%2032> <https://whyopencomputing.ch> <https://whyopencomputing.ch/fr/home/237-fairphone2.html>

3 2

debug logs for "This can be due to the local X server refusing access to the client"
by Robert Kudyba 19 Oct '17

19 Oct '17

I’ve restarted DBUS, systemd-logind, x2goserver, and deleted the user .x2go directory, X2Go just goes black and disappears. Here are debug logs from a Mac. Anything informative here? using the nightly builds: x2goserver-4.1.0.0-0.0x2go1.0.git20171015.1421.heuler.fc26.x86_64 /Applications/x2goclient.app/Contents/MacOS/x2goclient --debug x2go-INFO-1> "Starting X2Go Client..." x2go-WARNING-1> "English language requested, not loading translator." x2go-WARNING-1> "English language requested, not loading translator." x2go-INFO-3> "Started X2Go Client." x2go-DEBUG-../src/onmainwindow.cpp:518> "$HOME=/Users/ourschool" x2go-DEBUG-../src/onmainwindow.cpp:2279> Reading 5 sessions from config file. x2go-DEBUG-../src/sessionbutton.cpp:341> Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png". x2go-DEBUG-../src/sessionbutton.cpp:341> Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png". x2go-DEBUG-../src/sessionbutton.cpp:341> Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png". x2go-DEBUG-../src/sessionbutton.cpp:341> Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png". x2go-DEBUG-../src/sessionbutton.cpp:341> Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png". x2go-DEBUG-../src/x2goutils.cpp:219> path value at beginning: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin" x2go-DEBUG-../src/x2goutils.cpp:242> tmp_clean_add: ("/usr/local/bin") x2go-DEBUG-../src/x2goutils.cpp:270> clean_add: ("/usr/local/bin") x2go-DEBUG-../src/x2goutils.cpp:291> found entry i (0) in orig_path_list ("/usr/local/bin"): true x2go-DEBUG-../src/x2goutils.cpp:309> return value at end: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin" x2go-DEBUG-../src/x2goutils.cpp:219> path value at beginning: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin" x2go-DEBUG-../src/x2goutils.cpp:242> tmp_clean_add: ("/opt/local/bin") x2go-DEBUG-../src/x2goutils.cpp:270> clean_add: ("/opt/local/bin") x2go-DEBUG-../src/x2goutils.cpp:291> found entry i (0) in orig_path_list ("/opt/local/bin"): false x2go-DEBUG-../src/x2goutils.cpp:309> return value at end: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin" x2go-DEBUG-../src/pulsemanager.cpp:140> Found PA binary as "/Applications/x2goclient.app/Contents/exe/pulseaudio" x2go-DEBUG-../src/pulsemanager.cpp:141> Corresponding working dir: "/Applications/x2goclient.app/Contents/exe" x2go-DEBUG-../src/pulsemanager.cpp:232> pulse started with arguments("--exit-idle-time=-1", "-n", "-F", "/Users/ourschool/.x2go/pulse/config.pa", "-p", "/Applications/x2goclient.app/Contents/Frameworks/pulse-10.0/modules", "--high-priority", "--log-level=debug", "--verbose", "--log-target=file:/Users/ourschool/.x2go/pulse/pulse.log") ; waiting for finish... x2go-DEBUG-../src/onmainwindow.cpp:2759> Creating QPixmap with session icon: '":/img/icons/128x128/x2gosession.png"'. x2go-DEBUG-../src/onmainwindow.cpp:6231> Setting focus. x2go-INFO-8> "Starting connection to server: ourhost.dsm.ourschool.edu:22" x2go-DEBUG-../src/onmainwindow.cpp:2860> Starting new ssh connection to server:"ourhost.dsm.ourschool.edu":"22" krbLogin: false x2go-DEBUG-../src/sshmasterconnection.cpp:175> SshMasterConnection, host "ourhost.dsm.ourschool.edu"port 22user "me"useproxy falseproxyserver ""proxyport 22 x2go-DEBUG-../src/sshmasterconnection.cpp:212> Starting SSH connection without Kerberos authentication. x2go-DEBUG-../src/sshmasterconnection.cpp:216> SshMasterConnection, instance SshMasterConnection(0x7f8e23a45920) created. x2go-DEBUG-../src/sshmasterconnection.cpp:452> SshMasterConnection, instance SshMasterConnection(0x7f8e23a45920) entering thread. x2go-DEBUG-../src/sshmasterconnection.cpp:488> libssh not initialized yet. Initializing. x2go-DEBUG-../src/sshmasterconnection.cpp:799> cserverAuth x2go-DEBUG-../src/sshmasterconnection.cpp:814> state: 1 x2go-DEBUG-../src/sshmasterconnection.cpp:996> Challenge authentication failed. Trying password mechanism if available. x2go-DEBUG-../src/sshmasterconnection.cpp:1002> Password mechanism available. Continuing. x2go-DEBUG-../src/sshmasterconnection.cpp:1006> Password authentication requested. x2go-DEBUG-../src/sshmasterconnection.cpp:664> User authentication OK. x2go-DEBUG-../src/onmainwindow.cpp:2957> SSH connection established. x2go-DEBUG-../src/onmainwindow.cpp:3266> Continue normal X2Go session x2go-DEBUG-../src/sshprocess.cpp:199> Executing remote command via SshProcess object 0: "export HOSTNAME && x2golistsessions" x2go-DEBUG-../src/sshprocess.cpp:204> this=SshProcess(0x7f8e23831c90) Running masterCon->addChannelConnection(this, ' "1f60ae6a-760c-486f-88d5-e921d852cf20" ', ' "bash -l -c 'echo "X2GODATABEGIN:1f60ae6a-760c-486f-88d5-e921d852cf20"; export PATH="/usr/local/bin:/usr/bin:/bin"; export TERM="dumb"; export HOSTNAME && x2golistsessions; echo "X2GODATAEND:1f60ae6a-7" '); x2go-DEBUG-../src/sshmasterconnection.cpp:1325> Locking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1327> Passing new channel conenction object to channelConnections. x2go-DEBUG-../src/sshmasterconnection.cpp:1329> Unlocking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1517> Creating new channel. x2go-DEBUG-../src/sshmasterconnection.cpp:1521> New channel:0x7f8e216a1540 x2go-DEBUG-../src/sshmasterconnection.cpp:1552> Executing remote: "bash -l -c 'echo "X2GODATABEGIN:1f60ae6a-760c-486f-88d5-e921d852cf20"; export PATH="/usr/local/bin:/usr/bin:/bin"; export TERM="dumb"; export HOSTNAME && x2golistsessions; echo "X2GODATAEND:1f60ae6a-760c-486f-88d5-e921d852cf20";'" x2go-DEBUG-../src/sshmasterconnection.cpp:1575> New exec channel created. x2go-DEBUG-../src/sshmasterconnection.cpp:1624> EOF on channel 0x7f8e216a1540; SshProcess object: 0 x2go-DEBUG-../src/sshmasterconnection.cpp:1747> EOF sent. x2go-DEBUG-../src/sshmasterconnection.cpp:1751> Channel closed. x2go-DEBUG-../src/sshprocess.cpp:517> SSH finished: raw output (stdout): "X2GODATABEGIN:1f60ae6a-760c-486f-88d5-e921d852cf20 X2GODATAEND:1f60ae6a-760c-486f-88d5-e921d852cf20 " x2go-DEBUG-../src/sshprocess.cpp:528> SSH finished: true - "" (0). x2go-DEBUG-../src/onmainwindow.cpp:3655> "" x2go-DEBUG-../src/onmainwindow.cpp:4206> Executing remote command: "X2GODPI=90 x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D XFCE both" x2go-DEBUG-../src/sshprocess.cpp:199> Executing remote command via SshProcess object 1: "X2GODPI=90 x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D XFCE both" x2go-DEBUG-../src/sshprocess.cpp:204> this=SshProcess(0x7f8e2391b430) Running masterCon->addChannelConnection(this, ' "f872d4a4-0f60-455b-a58b-7cea74023a32" ', ' "bash -l -c 'echo "X2GODATABEGIN:f872d4a4-0f60-455b-a58b-7cea74023a32"; export PATH="/usr/local/bin:/usr/bin:/bin"; export TERM="dumb"; X2GODPI=90 x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_" '); x2go-DEBUG-../src/sshmasterconnection.cpp:1325> Locking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1327> Passing new channel conenction object to channelConnections. x2go-DEBUG-../src/sshmasterconnection.cpp:1329> Unlocking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1517> Creating new channel. x2go-DEBUG-../src/sshmasterconnection.cpp:1521> New channel:0x7f8e216a1540 x2go-DEBUG-../src/sshmasterconnection.cpp:1552> Executing remote: "bash -l -c 'echo "X2GODATABEGIN:f872d4a4-0f60-455b-a58b-7cea74023a32"; export PATH="/usr/local/bin:/usr/bin:/bin"; export TERM="dumb"; X2GODPI=90 x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D XFCE both; echo "X2GODATAEND:f872d4a4-0f60-455b-a58b-7cea74023a32";'" x2go-DEBUG-../src/sshmasterconnection.cpp:1575> New exec channel created. x2go-DEBUG-../src/sshmasterconnection.cpp:1624> EOF on channel 0x7f8e216a1540; SshProcess object: 1 x2go-DEBUG-../src/sshmasterconnection.cpp:1747> EOF sent. x2go-DEBUG-../src/sshmasterconnection.cpp:1751> Channel closed. x2go-DEBUG-../src/sshprocess.cpp:517> SSH finished: raw output (stdout): "X2GODATABEGIN:f872d4a4-0f60-455b-a58b-7cea74023a32 100 01398c9600695417af13b522a54471de 16561 me-100-1508424308_stDXFCE_dp32 50625 50626 50627 X2GODATAEND:f872d4a4-0f60-455b-a58b-7cea74023a32 " x2go-DEBUG-../src/sshprocess.cpp:528> SSH finished: true - "100 01398c9600695417af13b522a54471de 16561 me-100-1508424308_stDXFCE_dp32 50625 50626 50627 " (1). x2go-DEBUG-../src/onmainwindow.cpp:5019> Agent output: "100 01398c9600695417af13b522a54471de 16561 me-100-1508424308_stDXFCE_dp32 50625 50626 50627 " x2go-DEBUG-../src/sshprocess.cpp:372> Starting tunnel via SshProcess object 2: "localhost":50625 -> "localhost":51625 x2go-DEBUG-../src/onmainwindow.cpp:5612> "Starting NX proxy, command: "/Applications/x2goclient.app/Contents/exe/"nxproxy -S nx/nx,options=/Users/ourschool/.x2go/S-me-100-1508424308_stDXFCE_dp32/options:100" x2go-DEBUG-../src/sshprocess.cpp:157> Direct tunnel: waiting for connections on "localhost":51625 x2go-DEBUG-../src/onmainwindow.cpp:6071> Proxy wrote on stderr: " NXPROXY - Version 3.5.0 Copyright (C) 2001, 2010 NoMachine. See http://www.nomachine.com/ for more information. Info: Proxy running in client mode with pid '26232'. Session: Starting session at '" x2go-DEBUG-../src/onmainwindow.cpp:6071> Proxy wrote on stderr: "Thu Oct 19 10:45:11 2017'. Info: Connecting to remote host 'localhost:51625'. Info: Connection to remote proxy 'localhost:51625' established. " x2go-DEBUG-../src/sshprocess.cpp:109> New TCP connection. x2go-DEBUG-../src/sshprocess.cpp:114> New socket: 29 x2go-DEBUG-../src/sshmasterconnection.cpp:1517> Creating new channel. x2go-DEBUG-../src/sshmasterconnection.cpp:1521> New channel:0x7f8e2382b170 x2go-DEBUG-../src/sshmasterconnection.cpp:1527> Forwarding new channel, local port: 61509 x2go-DEBUG-../src/sshmasterconnection.cpp:1545> New channel forwarded. x2go-DEBUG-../src/onmainwindow.cpp:6071> Proxy wrote on stderr: "Info: Connection with remote proxy completed. Warning: Unrecognized session type 'unix-kde-depth_32'. Assuming agent session. " x2go-DEBUG-../src/onmainwindow.cpp:6071> Proxy wrote on stderr: "Warning: Failed to read data from the X auth command. Warning: Generated a fake cookie for X authentication. Info: Using ADSL link parameters 512/24/1/0. Info: Using cache parameters 4/4096KB/8192KB/8192KB. Info: Using pack method '16m-jpeg-9' with session 'unix-kde-depth_32'. Info: Using ZLIB data compression 1" x2go-DEBUG-../src/onmainwindow.cpp:6071> Proxy wrote on stderr: "/1/32. Info: Using ZLIB stream compression 4/4. Info: No suitable cache file found. Info: Forwarding X11 connections to display '/private/tmp/com.apple.launchd.UQytuZiERB/org.macosforge.xquartz:0'. Session: Session started at 'Thu Oct 19 10:45:13 2017'. Warning: Protocol mismatch or no X authentication data. " x2go-DEBUG-../src/onmainwindow.cpp:6071> Proxy wrote on stderr: "Session: Terminating session at 'Thu Oct 19 10:45:15 2017'. Info: Your session was closed before reaching a usable state. Info: This can be due to the local X server refusing access to the client. Info: Please check authorization provided by the remote X application. Session: Session terminated at 'Thu Oct 19 10:45:15 2017'. " x2go-DEBUG-../src/sshmasterconnection.cpp:1728> Socket 29 closed. x2go-DEBUG-../src/sshmasterconnection.cpp:1747> EOF sent. x2go-DEBUG-../src/sshmasterconnection.cpp:1751> Channel closed. x2go-DEBUG-../src/onmainwindow.cpp:5928> Deleting Proxy. x2go-DEBUG-../src/onmainwindow.cpp:5977> Waiting for proxy to exit. x2go-DEBUG-../src/onmainwindow.cpp:5997> Checking exit status. x2go-DEBUG-../src/sshprocess.cpp:199> Executing remote command via SshProcess object 3: "x2gocmdexitmessage me-100-1508424308_stDXFCE_dp32" x2go-DEBUG-../src/sshprocess.cpp:204> this=SshProcess(0x7f8e23924ac0) Running masterCon->addChannelConnection(this, ' "fb299317-66e7-4f80-8491-7ef708e414bf" ', ' "bash -l -c 'echo "X2GODATABEGIN:fb299317-66e7-4f80-8491-7ef708e414bf"; export PATH="/usr/local/bin:/usr/bin:/bin"; export TERM="dumb"; x2gocmdexitmessage me-100-1508424308_stDXFCE_dp32; echo "X2GO" '); x2go-DEBUG-../src/sshmasterconnection.cpp:1325> Locking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1327> Passing new channel conenction object to channelConnections. x2go-DEBUG-../src/sshmasterconnection.cpp:1329> Unlocking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1517> Creating new channel. x2go-DEBUG-../src/sshmasterconnection.cpp:1521> New channel:0x7f8e216ae870 x2go-DEBUG-../src/sshmasterconnection.cpp:1552> Executing remote: "bash -l -c 'echo "X2GODATABEGIN:fb299317-66e7-4f80-8491-7ef708e414bf"; export PATH="/usr/local/bin:/usr/bin:/bin"; export TERM="dumb"; x2gocmdexitmessage me-100-1508424308_stDXFCE_dp32; echo "X2GODATAEND:fb299317-66e7-4f80-8491-7ef708e414bf";'" x2go-DEBUG-../src/sshmasterconnection.cpp:1575> New exec channel created. x2go-DEBUG-../src/sshmasterconnection.cpp:1624> EOF on channel 0x7f8e216ae870; SshProcess object: 3 x2go-DEBUG-../src/sshmasterconnection.cpp:1747> EOF sent. x2go-DEBUG-../src/sshmasterconnection.cpp:1751> Channel closed. x2go-DEBUG-../src/onmainwindow.cpp:6054> Finished proxy. x2go-DEBUG-../src/sshprocess.cpp:517> SSH finished: raw output (stdout): "X2GODATABEGIN:fb299317-66e7-4f80-8491-7ef708e414bf X2GODATAEND:fb299317-66e7-4f80-8491-7ef708e414bf " x2go-DEBUG-../src/sshprocess.cpp:528> SSH finished: true - "" (3). x2go-DEBUG-../src/onmainwindow.cpp:9366> "Command message: " x2go-DEBUG-../src/sshmasterconnection.cpp:718> SshMasterConnection, instance SshMasterConnection(0x7f8e23a45920) waiting for thread to finish. x2go-DEBUG-../src/sshmasterconnection.cpp:1436> Disconnecting ... x2go-DEBUG-../src/sshmasterconnection.cpp:1447> Deleting channel connections. x2go-DEBUG-../src/sshmasterconnection.cpp:1455> Disconnecting session. x2go-DEBUG-../src/sshmasterconnection.cpp:1461> Deleting sockets. x2go-DEBUG-../src/sshmasterconnection.cpp:1468> All channels closed and session disconnected. Quiting session loop. x2go-DEBUG-../src/sshmasterconnection.cpp:722> SshMasterConnection, instance SshMasterConnection(0x7f8e23a45920) thread finished. x2go-DEBUG-../src/sshprocess.cpp:52> SshProcess destructor called. x2go-DEBUG-../src/sshprocess.cpp:52> SshProcess destructor called. x2go-DEBUG-../src/sshprocess.cpp:52> SshProcess destructor called. x2go-DEBUG-../src/sshprocess.cpp:52> SshProcess destructor called. x2go-DEBUG-../src/sshmasterconnection.cpp:729> SshMasterConnection, instance SshMasterConnection(0x7f8e23a45920) finished destructor. x2go-DEBUG-../src/onmainwindow.cpp:6231> Setting focus. ————— Oct 19 10:44:37 ourhost systemd-logind[7737]: New session 4075 of user me. Oct 19 10:44:37 ourhost /usr/bin/x2gostartagent[14994]: x2gostartagent called with options: 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D XFCE both Oct 19 10:44:37 ourhost /usr/bin/x2gosessionlimit[15010]: x2gosessionlimit has been called Oct 19 10:44:37 ourhost x2golistsessions[15011]: x2golistsessions has been called with options: --all-servers Oct 19 10:45:10 ourhost /usr/bin/x2gofeature[16543]: x2gofeature called with options: X2GO_RUN_EXTENSIONS Oct 19 10:45:10 ourhost /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features[16548]: x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS Oct 19 10:45:10 ourhost /usr/bin/x2goserver-run-extensions[16553]: x2goserver-run-extensions called with options: me-100-1508424308_stDXFCE_dp32 pre-start Oct 19 10:45:10 ourhost /usr/bin/x2gostartagent[16564]: creating new session: me-100-1508424308_stDXFCE_dp32 01398c9600695417af13b522a54471de 16561 150.108.68.33 50625 50626 50627 -1 -1 Oct 19 10:45:10 ourhost /usr/bin/x2gostartagent[16569]: blocking creation of agent's keyboard file /tmp/.x2go-me/C-me-100-1508424308_stDXFCE_dp32/keyboard as requested by session startup command Oct 19 10:45:10 ourhost /usr/bin/x2gostartagent[16571]: successfully started X2Go agent session with ID me-100-1508424308_stDXFCE_dp32 Oct 19 10:45:10 ourhost /usr/bin/x2gofeature[16578]: x2gofeature called with options: X2GO_RUN_EXTENSIONS Oct 19 10:45:10 ourhost /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features[16583]: x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS Oct 19 10:45:10 ourhost /usr/bin/x2goserver-run-extensions[16588]: x2goserver-run-extensions called with options: me-100-1508424308_stDXFCE_dp32 post-start Oct 19 10:45:15 ourhost /usr/bin/x2gocmdexitmessage[16667]: x2gocmdexitmessage called with options: me-100-1508424308_stDXFCE_dp32 Oct 19 10:45:16 ourhost systemd-logind[7737]: Removed session 4075.

1 0

error getting session bus: Failed to connect to socket Connection refused
by Robert Kudyba 18 Oct '17

18 Oct '17

I was able to get around the below errors by deleting the user’s .x2go directory. Any reason why this continues to happen? We’re using the nightly builds. Here are some logs. Fails with MATE and XFCE. rpm -q x2goserver x2goserver-4.1.0.0-0.0x2go1.0.git20171015.1421.heuler.fc26.x86_64 Unable to contact settings server Failed to connect to socket /run/user/xxxx/bus: Connection refused and the second was Unable to load a failsafesession Unsable to determine failsafe session name. Possible causes: xfconfd isn't running (D-Bus setup problem): environment variable $XDG_CONFIG_DIRS is set incorrectly (must include "etc'), or xfce4-session is installed incorrectly. more .xsession-x2go-o <http://xsession-x2go-erdos.dsm.fordham.edu/>urdomain-errors XSession-x2go: X session started for localuser at Wed Oct 18 09:45:30 EDT 2017 Failed to connect to bus: Connection refused dbus-update-activation-environment: error: unable to connect to D-Bus: Failed to connect to socket /run/user/xxxx/bus: Connection refused (imsettings-check:14190): IMSettings-WARNING **: Could not connect: Connection refused (imsettings-check:14190): GLib-GIO-CRITICAL **: g_dbus_proxy_call_sync_internal: assertion 'G_IS_DBUS_PROXY (proxy)' failed mate-session[14003]: WARNING: Could not make bus activated clients aware of XDG_CURRENT_DESKTOP=MATE environment variable: Could not connect: Connection refused mate-session[14003]: WARNING: Could not make bus activated clients aware of DISPLAY=:184 environment variable: Could not connect: Connection refused mate-session[14003]: WARNING: Could not make bus activated clients aware of MATE_DESKTOP_SESSION_ID=this-is-deprecated environment variable: Could not connect: Connection refused mate-session[14003]: dconf-WARNING: failed to commit changes to dconf: Could not connect: Connection refused mate-session[14003]: WARNING: Could not make bus activated clients aware of SESSION_MANAGER=local/unix:@/tmp/.ICE-unix/14003,unix/unix:/tmp/.ICE-unix/14003 environment variable: Could not connect: Connection refused Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged. mate-session[14003]: Gtk-CRITICAL: gtk_main_quit: assertion 'main_loops != NULL' failed mate-session[14003]: CRITICAL: dbus_g_proxy_new_for_name: assertion 'connection != NULL' failed Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged. mate-session[14003]: Gtk-CRITICAL: gtk_main_quit: assertion 'main_loops != NULL' failed mate-session[14003]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed mate-session[14003]: WARNING: Could not make bus activated clients aware of GTK_OVERLAY_SCROLLING=0 environment variable: Could not connect: Connection refused mate-session[14003]: WARNING: keycode1 not existent mate-session[14003]: WARNING: keycode2 not existent mate-session[14003]: WARNING: GSIdleMonitor: IDLETIME counter not found mate-session[14003]: GLib-GObject-CRITICAL: object GSIdleMonitor 0x556fe2443c80 finalized while still in-construction mate-session[14003]: GLib-GObject-CRITICAL: Custom constructor for class GSIdleMonitor returned NULL (which is invalid). Please use GInitable instead. mate-session[14003]: CRITICAL: error getting session bus: Failed to connect to socket /run/user/xxxx/bus: Connection refused mate-session[14003]: WARNING: Unable to register presence with session bus mate-session[14003]: CRITICAL: dbus_g_proxy_new_for_name: assertion 'connection != NULL' failed mate-session[14003]: CRITICAL: error getting session bus: Failed to connect to socket /run/user/xxxx/bus: Connection refused

1 0

Using x2go on thinclient Wyse
by Bel Pou 16 Oct '17

16 Oct '17

Hello, I want to know if x2go client can be installed on Wyse ThinLinux ? Has anyone ever realized that? Thank's

4 3

Black screen of death - please help
by Brian Walsh 13 Oct '17

13 Oct '17

Hi, I've recently upgraded from redhat 7.0 to 7.3 and as such lost some of my useful tools - one of which was x2go. So I reinstalled the relevant rpms and using the same client and config I now can login but just get a blank black screen with no way to open a terminal etc. I'm using XFCE (as I had before) - tries with gnome and few other session types all with the same result. Been googling this but can't seem to get an answer - appreciate any help as my stare is now as black and blank as the screen below! Client side and server side logs are below. There seems to be a problem with the waiting for keyboard to appear in the server logs - not sure how to change this. There is plenty of disk space on server. Client output: NXPROXY - Version 3.5.0 Copyright (C) 2001, 2010 NoMachine. See http://www.nomachine.com/ for more information. Info: Proxy running in client mode with pid '340'. Session: Starting session at 'Thu Oct 12 18:15:05 2017'. Info: Connecting to remote host 'localhost:47525'. Info: Connection to remote proxy 'localhost:47525' established. Info: Connection with remote proxy completed. Warning: Unrecognized session type 'unix-kde-depth_32'. Assuming agent session. Warning: Failed to read data from the X auth command. Warning: Generated a fake cookie for X authentication. Info: Using ADSL link parameters 512/24/1/0. Info: Using cache parameters 4/4096KB/8192KB/8192KB. Info: Using pack method '16m-jpeg-7' with session 'unix-kde-depth_32'. Info: Using ZLIB data compression 1/1/32. Info: Using ZLIB stream compression 4/4. Info: Using cache file '/cygdrive/C/Users/bwalsh/X2GO~1/cache-unix-kde-depth_32/S-57B9405EF162652E97E80D7B7C6EBC56'. Info: Forwarding X11 connections to display 'localhost:1'. Session: Session started at 'Thu Oct 12 18:15:06 2017'. Info: Established X server connection. Info: Using shared memory parameters 0/0K. Server side: Oct 12 18:15:01 bfs-dl360g7-26-xm1 systemd: Started Session 35 of user bwalsh. Oct 12 18:15:01 bfs-dl360g7-26-xm1 systemd-logind: New session 35 of user bwalsh. Oct 12 18:15:01 bfs-dl360g7-26-xm1 systemd: Starting Session 35 of user bwalsh. Oct 12 18:15:03 bfs-dl360g7-26-xm1 /usr/bin/x2goresume-session: x2goresume-session called with options: bwalsh-72-1507827821_stDXFCE_dp32 800x600 adsl 16m-jpeg-7 us auto 1 both Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features: x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/bin/x2goserver-run-extensions: x2goserver-run-extensions called with options: bwalsh-72-1507827821_stDXFCE_dp32 pre-resume Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/bin/x2goresume-session: client 10.20.60.62 has successfully resumed session with ID bwalsh-72-1507827821_stDXFCE_dp32 Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/bin/x2gofeature: x2gofeature called with options: X2GO_DESKTOPSHARING Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/bin/x2gosetkeyboard: x2gosetkeyboard called with options: bwalsh-72-1507827821_stDXFCE_dp32 Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features: x2goserver-extensions.features called with options: X2GO_DESKTOPSHARING Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/bin/x2gosetkeyboard: Waiting for /users/bwalsh/.x2go/C-bwalsh-72-1507827821_stDXFCE_dp32/keyboard to appear Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/share/x2go/x2gofeature.d/x2goserver.features: x2goserver.features called with options: X2GO_DESKTOPSHARING Oct 12 18:15:04 bfs-dl360g7-26-xm1 /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features: x2goserver-xsession.features called with options: X2GO_DESKTOPSHARING Oct 12 18:15:05 bfs-dl360g7-26-xm1 /usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS Oct 12 18:15:05 bfs-dl360g7-26-xm1 /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features: x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS Oct 12 18:15:05 bfs-dl360g7-26-xm1 /usr/bin/x2goserver-run-extensions: x2goserver-run-extensions called with options: bwalsh-72-1507827821_stDXFCE_dp32 post-resume Oct 12 18:15:05 bfs-dl360g7-26-xm1 /usr/bin/x2gosetkeyboard: Waiting for /users/bwalsh/.x2go/C-bwalsh-72-1507827821_stDXFCE_dp32/keyboard to appear Oct 12 18:15:06 bfs-dl360g7-26-xm1 /usr/bin/x2gosetkeyboard: Waiting for /users/bwalsh/.x2go/C-bwalsh-72-1507827821_stDXFCE_dp32/keyboard to appear Oct 12 18:15:07 bfs-dl360g7-26-xm1 /usr/bin/x2gomountdirs[13063]: x2gomountdirs has been called with options: dir bwalsh-72-1507827821_stDXFCE_dp32 bwalsh /users/bwalsh/.x2go/ssh/key.q14080 /cygdrive/C/Users/bwalsh/X2GO~1/S-82CD~1/spool__PRINT_SPOOL___REVERSESSH_PORT__46527 Oct 12 18:15:07 bfs-dl360g7-26-xm1 /usr/bin/x2gosetkeyboard: Waiting for /users/bwalsh/.x2go/C-bwalsh-72-1507827821_stDXFCE_dp32/keyboard to appear Oct 12 18:15:09 bfs-dl360g7-26-xm1 /usr/bin/x2gosetkeyboard: Waiting for /users/bwalsh/.x2go/C-bwalsh-72-1507827821_stDXFCE_dp32/keyboard to appear Oct 12 18:15:10 bfs-dl360g7-26-xm1 /usr/bin/x2gosetkeyboard: Waiting for /users/bwalsh/.x2go/C-bwalsh-72-1507827821_stDXFCE_dp32/keyboard to appear Oct 12 18:15:11 bfs-dl360g7-26-xm1 /usr/bin/x2gosetkeyboard: Waiting for /users/bwalsh/.x2go/C-bwalsh-72-1507827821_stDXFCE_dp32/keyboard to appear Oct 12 18:15:12 bfs-dl360g7-26-xm1 /usr/bin/x2gosetkeyboard: Setting X keyboard according to /users/bwalsh/.x2go/C-bwalsh-72-1507827821_stDXFCE_dp32/keyboard

3 2

Re: [X2Go-User] x2go fails with tcsh
by Mihai Moldovan 11 Oct '17

11 Oct '17

On 10/09/2017 12:44 PM, Frank Steiner wrote: > I was able to solve this. When I looked into the code, I saw that you > already to use "bash -c '...'" for all commands, so quoting shouldn't be > an issue. I really think it can get problematic easily, for instance with nested single quotes, that require special handling that differs from shell to shell - same thing for double quotes. Looks like you weren't hit by that issue, though. :) > But as the error message for tcsh was about > Warning: Protocol mismatch or no X authentication data. > I started looking at xauth and found an interesting difference between > bash and tcsh as login shell. > > For bash, these entries are added by x2gostartagent: > > myhost/unix:59 MIT-MAGIC-COOKIE-1 e938deb788659f0bf8c99069d199aff6 > myhost.ifi.lmu.de:59 MIT-MAGIC-COOKIE-1 e938deb788659f0bf8c99069d199aff6 > myhost.ifi.lmu.de:59 MIT-MAGIC-COOKIE-1 e938deb788659f0bf8c99069d199aff6 I knew that we're adding two entries, but it didn't come across that this might be the issue. Great debugging! Thanks. What feels odd is that there are three entries, two of which are equal. I'm not sure where the third one is coming from - in a quick test, I only see two entries on one of my sessions. Might be related to nxproxy adding another entry via xauth as well, but it still feels odd. Especially given that the two xauth calls in x2gostartagent both use ${HOSTNAME}, if ${HOSTNAME} is only "myhost", there should only be entries for myhost/unix:DISPLAY and myhost:DISPLAY. > For tcsh, I got those: > myhost.ifi.lmu.de/unix:58 MIT-MAGIC-COOKIE-1 7212fb8aa466de75ea0224a4d010f5e4 > myhost.ifi.lmu.de:58 MIT-MAGIC-COOKIE-1 7212fb8aa466de75ea0224a4d010f5e4 > myhost.ifi.lmu.de:58 MIT-MAGIC-COOKIE-1 7212fb8aa466de75ea0224a4d010f5e4 > > And that's the point! For some reason, x2go needs the cookie for > display "myhost/unix" at some point and "myhost.ifi.lmu.de/unix" > doesn't suffice. > > Indeed, when I wrote a little bash script > > #!/bin/bash > echo $HOSTNAME > > and called it with "ssh myhost bash -c './testscript'", it echoed > "myhost" with login shell bash, and "myhost.ifi.lmu.de" with > login shell tcsh. That's very interesting. bash seems to automatically populate HOSTNAME according to its man page, but the tcsh man page doesn't mention HOSTNAME at all -- only HOST, which is populated automatically by the gethostname() libc call and (on my system) returns the short hostname. I guess HOST and HOSTNAME might be the shell equivalents. It gets worse, though. I tested this on OS X, which is a BSD-like system. On this system, tcsh's HOST and bash's HOSTNAME values were the same again, BUT both included the domain name (and, incidentally, the 'hostname' program's default behavior is to print the FQDN hostname, which corresponds to the hostname returned by gethostname().) This may not sound interesting at first, because OS X is not an X2Go Server target, but according to the hostname man pages on FreeBSD, this matches this system's behavior (and it would be nice to eventually support *BSD as well at some point in time, even though that's not possible currently.) Luckily, all of them support the -s flag to hostname, so I'll just make use of it. > I'm not yet sure where this difference comes from, if it's deep inside > bash and tcsh or in some server-wide login scripts from SuSE (it > was not in the users dotfiles, we even removed them all). Whatever sets it, it's not tcsh itself. Likely some global startup script. Care to grep -R HOSTNAME /etc? The problem at hand really is that something sets and exports HOSTNAME. Since this variable is then defined in the environment, bash won't touch it. Clearly x2gostartagent uses bash (even if called from a tcsh shell) - but it inherits the exported HOSTNAME value and stuff goes boom. In my opinion, that's a bug that the distro should take care of. IMHO, the global startup scripts can set HOSTNAME, but shouldn't export this variable to the environment. > Anwyay, I added "setenv HOSTNAME `uname -n`" to my .cshrc and: > x2go works :-) Better use hostname -s. > To make that work for all our users I added > HOSTNAME=${HOSTNAME%%.*} > into x2gostartagent which doesn't harm if HOSTNAME is already > without the domain. So maybe you could add this to the next > release to help people running into the same issue. I'll fix up the server script. Mihai

2 2

x2goclient MacOS
by Robert Dinse 11 Oct '17

11 Oct '17

x2go-client versions 4.1.0.0 and 4.1.1.0 both core dump under MacOS X 10.7.5 (Lion). 4.0.0.1 does not but also will not login to a non-root account on Ubuntu server. -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting. Knowledgeable human assistance, not telephone trees or script readers. See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874.

2 2

x2go fails with tcsh
by Frank Steiner 09 Oct '17

09 Oct '17

Hi, we just tried to x2go for the first time (client 4.0.5.2 server 4.0.1 on SLED 12). It works fine for users with bash as login shell on the server side, but fails for those with tcsh. According to http://blog.x2go.org/index.php/2012/07/26/x2go-sessions-startups-for-users-… this should have been fixed a while ago, but it seems to have returned. I couldn't see any difference neither in the server log (debug level) nor in the output of "x2goclient --debug". The clients are identical until the line x2go-DEBUG-../src/onmainwindow.cpp:6014> Proxy wrote on stderr: "Session: Session started at 'Fri Oct 6 16:43:09 2017'. and then the tcsh instance exits with Warning: Protocol mismatch or no X authentication data. while the bash version continues with x2go-DEBUG-../src/onmainwindow.cpp:6014> Proxy wrote on stderr: "Info: Established X server connection. The server logs are identical until the line 2017-10-06T16:43:09.173981+02:00 knuth /usr/lib/x2go/x2gocreatesession[21667]: db_createsession called, session ID: fst-76-1507300986_stDmwm_dp24, cookie: 7b94de4d7f6bdbcda01a3dc547c42f66, client: xx:xx:xx:xx, pid: 21620, graphics port: 35760, sound port: 35761, file sharing port: 35762 and then the tcsh instance exits with 2017-10-06T16:43:15.007175+02:00 knuth sshd[21228]: pam_unix(sshd:session): session closed for user fst 2017-10-06T16:43:15.011998+02:00 knuth systemd-logind[9940]: Removed session 59. Is this problem known already? Sth. I could try to solve it? We wouldn't like to force all our users to switch away from their tcsh... cu, Frank -- Dipl.-Inform. Frank Steiner Web: http://www.bio.ifi.lmu.de/~steiner/ Lehrstuhl f. Bioinformatik Mail: http://www.bio.ifi.lmu.de/~steiner/m/ LMU, Amalienstr. 17 Phone: +49 89 2180-4049 80333 Muenchen, Germany Fax: +49 89 2180-99-4049 * Rekursion kann man erst verstehen, wenn man Rekursion verstanden hat. *

3 5

X2Go for non-bash users
by Marlin Whitaker 07 Oct '17

07 Oct '17

We have found that a user whose default shell is tcsh is affected by bash startup files when running X2Go. I assume this because x2go runs under the bash script x2goruncommand and inherits its environment. Is this correct? Is there any way around this problem? Thanks. -- Marlin

1 1

Connect Time
by Robert Dinse 06 Oct '17

06 Oct '17

Just for drill, I timed the amount of time it took to connect using my 2005 vintage Mac Pro 1,1, a whole of 5 seconds. -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting. Knowledgeable human assistance, not telephone trees or script readers. See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874.

1 0

ttyname failed error
by Joshua Alexander 05 Oct '17

05 Oct '17

Hello all, I'm trying to get x2go set up on CentOS 6. When I try to connect the client says "Connection failed. megs: ttyname failed. Invalid argument megs: ttyname failed: Invalid argument"... any ideas how to troubleshoot? Thanks, Josh

2 2

Re: [X2Go-User] Incomplete redrawing,of screen
by Ulrich Sibiller 04 Oct '17

04 Oct '17

What window manager are you using on the client? Uli Vom Smartphone gesendet. ----- Ursprüngliche Nachricht ----- Von: "K. Reinhold Trier" <R.Trier(a)it-jobst.de> Gesendet: ‎04.‎10.‎2017 19:03 An: "Ulrich Sibiller" <uli42(a)gmx.de> Betreff: Re: [X2Go-User] Incomplete redrawing,of screen Am 03.10.2017 um 17:37 schrieb Ulrich Sibiller: >> OK, but nevertheless I would like to know what I can do about it. For sure >> it's not a software-problem. I have an automated installation script which >> installs thick clients with the same software on different hardware. The >> installation runs fine e.g. on a virtual box on my workstation. And it runs >> also fine on a ZBOX when I use the VGA connection. Is there anybody who has >> solved the problem (maybe by changing parameters for the HDMI-Connection) or >> is the solution simply to buy more expensive hardware? > Well, some Ubuntu bug reports suggest activating "Intel tearfree mode" > for your hardware - however, I don't know what that is or if it yould > help here. Thank you, I'll try that when I find the time to do it >>> What Desktop Environment are you using? Does the problem happen with >>> other Desktop Environments, too? Does it show in singe application >>> mode? >> If you mean by single application mode that an application uses full screen: it's not shown in that case > No, I mean that you connect to the x2goserver and only run a single > application that is shown on your display just like any local software > would. You can activate that by going to the session setting in > x2goclient, first tab, last row and select "Application" instead of > "XFCE" or "KDE" or whatever. I tried it with Firefox. The error does not happen in this case - anyhow it happens only when window frames are crossing. But I had a different difficulty: the menus in the first line didn't work. When clicking on them, only a short flash appeared and disappeared. I was not able to leave the program and had to restart the box. Reinhold

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Re: [X2Go-User] Incomplete redrawing,of screen
by K. Reinhold Trier 03 Oct '17

03 Oct '17

It's not a problem of the of the Xserver. A (software) screenshot shows a correct screen, this is what the Xserver "thinks" he would display whereas the real screen is scrambled. But only in the case of a x2go-connection, not in local operations. And - as described before - only when using hardware of somehow low performance together with HDMI connection. I found a posting describing a similar problem: http://lists.x2go.org/pipermail/x2go-user/2016-February/003717.html Reinhold Am 02.10.2017 um 17:29 schrieb Ulrich Sibiller: > On Mon, Oct 2, 2017 at 4:49 PM, K. Reinhold Trier > <R.Trier(a)it-jobst.de> wrote: >> Hello, >> >> we are using x2go server and clients both on Ubuntu 16.04. After >> configuring new clients on small single board boxes like a ZODAC >> Zbox or a Raspberry Pi 3 we observe severe screen redrawing >> problems an a very poor performance in video transfer. E.G. >> shifting a Thunderbird-window over a Firefox-window the latter >> remains scrambled with rests of Thunderbird. We didn't run into >> that problem in our former installation based on Ubuntu 12.04. >> After searching for solutions in the compression method and the >> CPU-performance of the clients I occasionally found out that the >> problem disappears after connecting the client's monitor via VGA >> instead of a HDMI connection. The problem even disappears when a >> HDI/VGA-Adapter is used and the signal is fed to the monitor via an >> VGA-input. This was tested with different monitors. In our former >> clients we only used VGA connected monitors and so we could not see >> the problems. The optical quality of a HDMI connected Monitor is >> notably better than that of VGA connected one, furthermore the VGA >> connection seems to become obsolete, so we would like to stay with >> HDMI. What can be the reason and is there a way change the >> HDMI-output in to a suitable configuration? > > To me this sounds like a buggy Xserver on the client. There's really > nothing in X2go (or better: in NX) that cares about the type of > connection. > > Uli

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Incomplete redrawing,of screen
by K. Reinhold Trier 02 Oct '17

02 Oct '17

Hello, we are using x2go server and clients both on Ubuntu 16.04. After configuring new clients on small single board boxes like a ZODAC Zbox or a Raspberry Pi 3 we observe severe screen redrawing problems an a very poor performance in video transfer. E.G. shifting a Thunderbird-window over a Firefox-window the latter remains scrambled with rests of Thunderbird. We didn't run into that problem in our former installation based on Ubuntu 12.04. After searching for solutions in the compression method and the CPU-performance of the clients I occasionally found out that the problem disappears after connecting the client's monitor via VGA instead of a HDMI connection. The problem even disappears when a HDI/VGA-Adapter is used and the signal is fed to the monitor via an VGA-input. This was tested with different monitors. In our former clients we only used VGA connected monitors and so we could not see the problems. The optical quality of a HDMI connected Monitor is notably better than that of VGA connected one, furthermore the VGA connection seems to become obsolete, so we would like to stay with HDMI. What can be the reason and is there a way change the HDMI-output in to a suitable configuration? Best regards Reinhold

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X2godesktopsharing
by "BOTZ Franck (Administrateur Systèmes et Résea ux) - DDT 67/SIDSIC/Pôle Infra" 30 Sep '17

30 Sep '17

Hi ! My server run xubuntu 16.04. users can open session and work with applications. When they activate the x2godesktopsharing program, they see the icon on the systray and can activate the desktop sharing. So, then i launch the x2goclient with local desktop as profil. The session openned and i can see all x2godesktopsharing that run on the server. I select a session, ans try ton connecter with all rights. The user as a windoWs wich ask him to accept the connexion. After that, à second Windows come and want tout authentify as the admin user tout allow running applications as a different user. In auth.log, i see something like polkitd .... Any ideas ? Regards. Franck Franck Botz

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Re: [X2Go-User] X2Go trouble on Ubuntu (fwd)
by Robert Dinse 27 Sep '17

27 Sep '17

This customer with MacOS 10.x and 4.1.1.0 of Ubuntu gets this error, he also gets it with previous versions. I have an older Mac Pro 1,1 running Mac OS 10.7.5 and I also get this error if I try to login to a ubuntu server with a normal username but if I login as root it works fine. I tried moving /etc/profile out of the way just to eliminate the bashism's issue, made no difference. Client version 4.1.1.0 and 4.1.0.0 both core dump on my machine with a invalid kernel address error. 4.0.0.1 does not but still gets this same error. I can login to the same Ubuntu server with regular user ID's using 4.1.1.0 under Linux just fine. The customer can login to CentOS machines with this client and same user ID. -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting. Knowledgeable human assistance, not telephone trees or script readers. See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874. ---------- Forwarded message ---------- Date: Sun, 24 Sep 2017 15:18:22 -0700 From: Dan Church <churchd(a)eskimo.com> To: Robert Dinse <nanook(a)eskimo.com> Subject: Re: X2Go trouble on Ubuntu I downloaded X2Go v. 4.1.1.0 (Qt - 4.8.7) No go. Same error. /home/churchd/.bash_profile: Operation not permitted. - Dan

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QuestaSim major issue
by carl langlois 23 Sep '17

23 Sep '17

Hi , I know that it as been discuss at one point in the forum but the thread ended. We are using a tool call Qestasim from mentor graphc. It use TK a GUI widget. The probleme is when using this tool in publish application all the others application seem to freeze and x2go is unusable. This seem to related to NX in some way becasue i have the same issue with openx. Also when using in desktop mode it is all fine.. We have a couple of application with lightweith application written in TK also and it seem a bit slower with those app. Any hint would be appreciate on how to debug this.. Thanks for your help. Carl

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Re: [X2Go-User] Keyboard problem with special characters #@
by Ruben Di Battista 18 Sep '17

18 Sep '17

I always had problems with OSX and x2go. In my case it was on a fedora Fc20. I solved setting up English on the target machine and then providing a xmodmap keymapping. Did you try something like this? https://stackoverflow.com/a/42094562/1334711 Sent from mobile. I'm sorry for any possible unwanted typo. Il 16 set 2017 12:00 PM, <x2go-user-request(a)lists.x2go.org> ha scritto: Send x2go-user mailing list submissions to x2go-user(a)lists.x2go.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.x2go.org/listinfo/x2go-user or, via email, send a message with subject or body 'help' to x2go-user-request(a)lists.x2go.org You can reach the person managing the list at x2go-user-owner(a)lists.x2go.org When replying, please edit your Subject line so it is more specific than "Re: Contents of x2go-user digest..." Today's Topics: 1. Keyboard problem with special characters #@ (Markus Gschwind) ---------------------------------------------------------------------- Message: 1 Date: Fri, 15 Sep 2017 16:43:23 +0200 From: Markus Gschwind <markus.gschwind(a)gmail.com> To: x2go-user(a)lists.x2go.org Subject: [X2Go-User] Keyboard problem with special characters #@ Message-ID: <CABaUQnxZ=wiWqPxouKYVAX6YuUCDuEgJVR4ejf+pqnibYNjkGg(a)mail.gmail.com> Content-Type: text/plain; charset="utf-8" Dear all, I am getting myself comfortable with X2goclient. However, I cannot get the special characters in the remote environement (# @ etc., principally the AltGr functions). I use the version X2Go Client v. 4.1.0.0 (Qt - 4.8.7) on a MacBook Pro mid 2012 running OSX ElCaptain 10.11.6 (15G1611) with a standard american keyboard which I have mapped CH_FR. On the linux Side it is Centos6, where I have selected System => Keyboard => Layouts : Keyboard model: MBP intel Mapping CH_FR Macintosh How can I get that keyboard problem fixed? Thank you very much! Best, Markus

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Emacs crashes on start
by Roderick Johnstone 18 Sep '17

18 Sep '17

Hi I'm connecting from a Mac (X2Go Client v. 4.0.5.1 (Qt - 4.8.7)) to Fedora 24 with a xfce session using the x2goserver-4.0.1.19-11.fc24.x86_64 packages from the fedora repos. On starting emacs, I get the error below. This issue seems to have been around for a while in similar forms, but didn't affect me under Fedora 22. Is anyone in a position to confirm this issue on Fedora 24 and suggest a work around? I tried setting various environment variables suggested on various web pages for similar issues and in the bug report noted in the error message (and checked /etc/PROBLEMS), but nothing was effective. emacs starts fine in an xfce session at the console. Thanks Roderick Johnstone X protocol error: BadRequest (invalid request code or no such operation) on protocol request 131 When compiled with GTK, Emacs cannot recover from X disconnects. This is a GTK bug: https://bugzilla.gnome.org/show_bug.cgi?id=85715 For details, see etc/PROBLEMS. Fatal error 6: Aborted Backtrace: emacs[0x50ad3c] emacs[0x4f11ec] emacs[0x50ade3] emacs[0x4c0f60] emacs[0x4c58b6] emacs[0x4c593b] /lib64/libX11.so.6(_XError+0x12d)[0x2b5baa0ff57d] /lib64/libX11.so.6(+0x413e7)[0x2b5baa0fc3e7] /lib64/libX11.so.6(+0x414ad)[0x2b5baa0fc4ad] /lib64/libX11.so.6(_XReply+0x238)[0x2b5baa0fd478] /lib64/libX11.so.6(XQueryPointer+0x91)[0x2b5baa0f3351] /lib64/libgdk-3.so.0(+0x4da2a)[0x2b5ba8150a2a] /lib64/libgdk-3.so.0(+0x6a605)[0x2b5ba816d605] /lib64/libgdk-3.so.0(gdk_window_get_device_position_double+0x10b)[0x2b5ba8143d1b] /lib64/libgdk-3.so.0(gdk_window_get_device_position+0x2d)[0x2b5ba8143e1d] /lib64/libgtk-3.so.0(+0x321199)[0x2b5ba7b48199] /lib64/libgtk-3.so.0(+0x3216f4)[0x2b5ba7b486f4] /lib64/libgdk-3.so.0(+0x253d8)[0x2b5ba81283d8] /lib64/libglib-2.0.so.0(+0x4a173)[0x2b5ba97d0173] /lib64/libglib-2.0.so.0(g_main_context_dispatch+0x163)[0x2b5ba97cf703] emacs[0x5e0b78] emacs[0x5a6025] emacs[0x4fc1bc] emacs[0x4fdfdd] emacs[0x4ffc24] emacs[0x564642] emacs[0x4f16b4] emacs[0x5645e3] emacs[0x4f1670] emacs[0x4f5e6b] emacs[0x4f61c8] emacs[0x419b52] /lib64/libc.so.6(__libc_start_main+0xf1)[0x2b5bb17db731] emacs[0x41a639] Aborted (core dumped)

8 20

Keyboard problem with special characters #@
by Markus Gschwind 15 Sep '17

15 Sep '17

Dear all, I am getting myself comfortable with X2goclient. However, I cannot get the special characters in the remote environement (# @ etc., principally the AltGr functions). I use the version X2Go Client v. 4.1.0.0 (Qt - 4.8.7) on a MacBook Pro mid 2012 running OSX ElCaptain 10.11.6 (15G1611) with a standard american keyboard which I have mapped CH_FR. On the linux Side it is Centos6, where I have selected System => Keyboard => Layouts : Keyboard model: MBP intel Mapping CH_FR Macintosh How can I get that keyboard problem fixed? Thank you very much! Best, Markus

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