x2go-user

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2315 discussions

Issue (typo?) with SPF record
by Chris Puttick 17 Mar '19

17 Mar '19

Hi I just subscribed to the list (hi!) and the confirmation email arrived in Google Mail's spam. While their spam filter has becoming over-sensitive in recent times, in this case it appears to be a typo in the SPF record: "v=spf1 include:das-netwzerkteam.de mx ?all" where das-netwzerken.de is an NXDOMAIN (should be das-netzwerken.de?) Regards Chris -- @putt1ck putt1ck.blogspot.com skype: putt1ck Opinions in this email are my own and may not reflect that of my clients, past employers, associates, friends, family, pets etc..

1 0

x2go Connecting from Mac to Linux
by Ute Roehrig 15 Mar '19

15 Mar '19

Hello, I've been using x2go for a long time to connect from a Mac to a Linux Desktop running Kubuntu 16.04 (KDE running locally). A few weeks back I ran into trouble with x2go crashing very often, and each time killing my VPN connection. To understand if the OSX version was the problem, I updated my Mac from 10.13. High Sierra to 10.14.3 Mojave, but the problem persists. Some observations: When connecting to the Linux Desktop without VPN (possible only when physically connected to the same network), the problem persists. When running only the VPN without x2go, the connection is stable. Non-graphical ssh sessions are stable. Connecting to a suspended session seems to make things worse (more frequent crashes). Using xfce or mate doesn't change anything. When running the x2go client (Version 4.1.2.1) in debug mode, at a certain point (but not upon startup) I get one of the following messages: x2go-DEBUG-../src/sshmasterconnection.cpp:2193> "ssh_channel_open_session failed": "Socket error: Connection reset by peer" x2go-DEBUG-../src/sshmasterconnection.cpp:2193> "ssh_channel_open_session failed": "Socket error: No such file or directory" x2go-DEBUG-../src/sshmasterconnection.cpp:2193> "ssh_channel_open_session failed": "Socket error: Can't assign requested address" x2go-DEBUG-../src/sshmasterconnection.cpp:2193> "ssh_channel_open_session failed": "Socket error: Operation timed out" Any help would be greatly appreciated! -Ute

2 3

postgres session backend, ldap users first login and pam_mkhomedir
by Ja Bi 15 Mar '19

15 Mar '19

Hi, I try to run x2go with postgres as session backend. I have users in ldap database and i would like to use pam_mkhomedir when user connects with x2 goclient/pyhoca for the first time, so i have no $HOME, no $HOME/.x2go and no $HOME/.x2go/sqlpass. I tryied x2godbadmin --addgroup x2gousers from https://wiki.x2go.org/doku.php/wiki:advanced:multi-node:x2goserver- pgsql but 1) group is from ldap/sssd (i think i must switch on sssd enumerate to get members of ldap groups :( ) 2) x2godbadmin does "sub add_user()" so it creates $HOME/.x2go of group members (and it creates it under user who runs x2godbadmin - so $HOME owner is root ) and pam_mkhomedir does not take efect so... How do you set up this scenarios? x2goserver-4.1.0.0-0.0x2go1.1.git20180302.1517.main.x86_64 SUSE Linux Enterprise Server 12 (x86_64) VERSION = 12 PATCHLEVEL = 0 thank you very much H.

1 0

Clipboard stops working
by Norm Green 11 Mar '19

11 Mar '19

Hello List, I find that the clipboard stops working after a period of time. Specifically, copying from the windows desktop to the x2go window doesn't work because x2go thinks the clipboard is empty. I am copying from emacs on Windows to emacs on Linux. It doesn't matter how many times I select and copy on windows, x2go does not pass the clipboard contents to emacs on Linux. But if I disconnect from the server and reconnect, it works, using the same emacs windows. This is with x2go client 4.1.1.1 running on Win7, but it also happened on previous x2go client versions (4.0.x) . x2go server 4.0.1.20 is running on Ubuntu 16.04 Is this a known bug? Any way to fix it? Norm Green

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Connection timeout over high latency network links
by Brent Roman 08 Mar '19

08 Mar '19

I'm trying to run a remote X-session on a satellite link. The ping latency is typically 800ms. I have no trouble ssh'ing to the remote machine, but, whenever I try to connect a remote session via the x2goclient, it ends within a couple seconds with a dialog box saying: Timeout connecting to raven raven is the remote hostname. Both machines are running Debian Jessie. The x2goclient is version 4.4.1.0 Is there some connection timeout parameter that I could increase to make it possible to use high latency links? Is this fixed in newer versions? Thanks! -- Brent Roman MBARI Software Engineer Tel: (831) 775-1808 7700 Sandholdt Road, Moss Landing, CA 95039 mailto:brent@mbari.org http://www.mbari.org/~brent

2 2

Could the desktop session be initiated in batch mode on the server side?
by Pontiggia, Francesco 07 Mar '19

07 Mar '19

Hello, I am trying to understand if x2go can be used for a specific use case I am working on. Our team manages an HPC linux cluster for researchers at our University. We have an interactive computing portal that allows users to schedule interactive jobs on our cluster, including Remote Desktop sessions that are not in the login space, but run as jobs on the compute nodes . At the moment we use VNC + Xfce to setup those sessions. The job gets started by the SLURM scheduler on the compute nodes, and the job script (run as the user who submits the job) starts up a vncserver and xfce4-session. Users can then connect to their sessions either via noVNC or with a regular VNC client. The performance of our current setup does not match the needs of some of our users and I am looking for alternatives for those specific edge cases. >From what I understand from reading the docs and to the extent of my limited personal experience with X2go, X2go is typically setup as a login solution, where the session is typically started from when the client logs in. I was wondering if there was a way in which I could configure the software to match as close as possible our current Remote Desktop session compute jobs setup. In particular, can I have the desktop session started from a batch job and then sit and wait for the client to connect? And could I configure things so that clients connecting will only be able to attach to existing sessions and not initiate new ones? Thanks for any advise you might have. Best Regards Francesco

1 0

x2gobroker on CentOS 7
by quetengoqueponeraqui 05 Mar '19

05 Mar '19

Hi guys, I’m trying to install the broker on a CentOS 7 machine (rpms not on epel, so downloading from x2go’s repos) but it complains about several python3 dependencies. Even with python36 installed it cannot find python3 and related packages. Any idea? Cheers

2 1

Agent Terminated Unexpectedly. Aborting Session Startup
by Ioannis Vlachos 04 Mar '19

04 Mar '19

Hi, I’m using X2Go daily for years now. Today, while using a session, X2go crashed and that’s where it all started. Server is a Centos 7 using XFCE and client is a Mac. 90% of the times a crash happens (rarely), I can resume the session and 10% I have to start a new one. This time it was different and started my ordeal: When trying to reconnect, I got a dbus error (failed to connect to socket, dbus connection refused). Still got some sort of session but windows were all over the place and was unusable. Reinstalled dbus, x2go and removed .x2go from client and server, as well .cache. Reinstalled xfce, removed xfce, and installed MATE. All these did not happen in one go. A trillion of step by step trials and errors (practically only errors) Now, I can connect to MATE via ssh X11 (XQuartz). It works. However, X2go refuses to connect with: Agent Terminated Unexpectedly. Aborting Session Startup Log files are not very informative, since not much seem to be happening (at least to me). I’ve incorporated the debut logging, server-side, while –debug in the client shows the following: x2go-INFO-1> "Starting X2Go Client 4.1.2.1..." x2go-WARNING-1> English language requested, not loading translator. x2go-WARNING-1> English language requested, not loading translator. Object::connect: No such slot ONMainWindow::slotCheckAgentProcess() x2go-INFO-3> "Started X2Go Client." x2go-DEBUG-../src/onmainwindow.cpp:563> "$HOME=/Users/USER" x2go-DEBUG-../src/onmainwindow.cpp:2242> Reading 2 sessions from config file. x2go-DEBUG-../src/sessionbutton.cpp:342> Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png". x2go-DEBUG-../src/sessionbutton.cpp:342> Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png". x2go-DEBUG-../src/onmainwindow.cpp:12843> libssh not initialized yet. Initializing. x2go-DEBUG-../src/x2goutils.cpp:219> path value at beginning: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/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:/Library/TeX/texbin:/opt/X11/bin" x2go-DEBUG-../src/x2goutils.cpp:219> path value at beginning: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/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: "/opt/local//bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/opt/X11/bin" x2go-DEBUG-../src/pulsemanager.cpp:131> Found PA binary as "/Applications/x2goclient.app/Contents/exe/pulseaudio" x2go-DEBUG-../src/pulsemanager.cpp:132> Corresponding working dir: "/Applications/x2goclient.app/Contents/exe" x2go-DEBUG-../src/pulsemanager.cpp:369> pulseaudio --version returned:"pulseaudio 11.1-rebootstrapped " x2go-DEBUG-../src/pulsemanager.cpp:227> pulse started with arguments ("--exit-idle-time=-1", "-n", "-F", "/Users/USER/.x2go/pulse/config.pa", "-p", "/Applications/x2goclient.app/Contents/Frameworks/pulse-11.1/modules", "--high-priority", "--log-level=debug", "--verbose", "--log-target=file:/Users/USER/.x2go/pulse/pulse.log") - waiting for it to finish... WARNING: failed to kill process group '6786': No such process x2go-DEBUG-../src/onmainwindow.cpp:2728> Creating QPixmap with session icon: '":/img/icons/128x128/x2gosession.png"'. x2go-DEBUG-../src/onmainwindow.cpp:6425> Setting focus. x2go-INFO-8> "Starting connection to server: server.address.net:22" x2go-DEBUG-../src/onmainwindow.cpp:2829> Starting new ssh connection to server:" server.address.net ":"22" krbLogin: false x2go-DEBUG-../src/sshmasterconnection.cpp:175> SshMasterConnection, host " server.address.net "; port 22; user "user"; useproxy true; proxyserver "proxy.address.net"; proxyport 1234 x2go-DEBUG-../src/sshmasterconnection.cpp:248> Starting SSH connection without Kerberos authentication. x2go-DEBUG-../src/sshmasterconnection.cpp:252> SshMasterConnection, instance SshMasterConnection(0x7fd7791cd2f0) created. x2go-DEBUG-../src/sshmasterconnection.cpp:520> SshMasterConnection, instance SshMasterConnection(0x7fd7791cd2f0) entering thread. x2go-DEBUG-../src/sshmasterconnection.cpp:524> proxyserver: "proxy.address.net"; proxyport: 1234; proxylogin: "user" x2go-DEBUG-../src/sshmasterconnection.cpp:175> SshMasterConnection, host "proxy.address.net"; port 1234; user "user"; useproxy false; proxyserver ""; proxyport 0 x2go-DEBUG-../src/sshmasterconnection.cpp:248> Starting SSH connection without Kerberos authentication. x2go-DEBUG-../src/sshmasterconnection.cpp:252> SshMasterConnection, instance SshMasterConnection(0x7fd777c3d900) created. x2go-DEBUG-../src/sshmasterconnection.cpp:520> SshMasterConnection, instance SshMasterConnection(0x7fd777c3d900) entering thread. x2go-DEBUG-../src/sshmasterconnection.cpp:840> Session port before config file parse: 1234 x2go-DEBUG-../src/sshmasterconnection.cpp:850> Session port after config file parse: 1234 x2go-DEBUG-../src/sshmasterconnection.cpp:915> Session port before config file parse (part 2): 1234 x2go-DEBUG-../src/sshmasterconnection.cpp:925> Session port after config file parse (part 2): 1234 x2go-DEBUG-../src/sshmasterconnection.cpp:950> cserverAuth x2go-DEBUG-../src/sshmasterconnection.cpp:991> state: 1 x2go-DEBUG-../src/sshmasterconnection.cpp:1274> Trying password mechanism if available. x2go-DEBUG-../src/sshmasterconnection.cpp:1278> Password mechanism available. Continuing. x2go-DEBUG-../src/sshmasterconnection.cpp:726> User authentication OK. x2go-DEBUG-../src/sshmasterconnection.cpp:1789> LOGIN CHECK:"LOGIN OK " x2go-DEBUG-../src/sshmasterconnection.cpp:1792> don't have interaction x2go-DEBUG-../src/sshmasterconnection.cpp:1825> LOOP FINISHED x2go-DEBUG-../src/sshmasterconnection.cpp:1829> No interaction needed, continue session x2go-DEBUG-../src/sshmasterconnection.cpp:735> Login Check - OK x2go-DEBUG-../src/sshmasterconnection.cpp:260> SSH proxy connected. x2go-DEBUG-../src/sshprocess.cpp:381> Starting tunnel via SshProcess object 0: "server.address.net":22 -> "127.0.0.1":44444 x2go-DEBUG-../src/sshmasterconnection.cpp:498> SSH proxy tunnel established. x2go-DEBUG-../src/sshprocess.cpp:157> Direct tunnel: waiting for connections on "127.0.0.1":44444 x2go-DEBUG-../src/sshmasterconnection.cpp:840> Session port before config file parse: 44444 x2go-DEBUG-../src/sshmasterconnection.cpp:850> Session port after config file parse: 44444 x2go-DEBUG-../src/sshprocess.cpp:109> New TCP connection. x2go-DEBUG-../src/sshprocess.cpp:114> New socket: 28 x2go-DEBUG-../src/sshmasterconnection.cpp:2083> Creating new channel. x2go-DEBUG-../src/sshmasterconnection.cpp:2100> New channel:0x7fd777de7e90 x2go-DEBUG-../src/sshmasterconnection.cpp:2106> Forwarding parameters: from remote ("server.address.net":22) to local ("127.0.0.1":54540) x2go-DEBUG-../src/sshmasterconnection.cpp:2143> Temporary session port after config file parse: 22 x2go-DEBUG-../src/sshmasterconnection.cpp:2147> Temporary session host after config file parse: server.address.net x2go-DEBUG-../src/sshmasterconnection.cpp:2177> New channel forwarded. x2go-DEBUG-../src/sshmasterconnection.cpp:861> Connected via proxy, resetting connection values on session to server.address.net:22 x2go-DEBUG-../src/sshmasterconnection.cpp:915> Session port before config file parse (part 2): 22 x2go-DEBUG-../src/sshmasterconnection.cpp:925> Session port after config file parse (part 2): 22 x2go-DEBUG-../src/sshmasterconnection.cpp:950> cserverAuth x2go-DEBUG-../src/sshmasterconnection.cpp:991> state: 1 x2go-DEBUG-../src/sshmasterconnection.cpp:1274> Trying password mechanism if available. x2go-DEBUG-../src/sshmasterconnection.cpp:1278> Password mechanism available. Continuing. x2go-DEBUG-../src/sshmasterconnection.cpp:726> User authentication OK. x2go-DEBUG-../src/sshmasterconnection.cpp:1789> LOGIN CHECK:"LOGIN OK " x2go-DEBUG-../src/sshmasterconnection.cpp:1792> don't have interaction x2go-DEBUG-../src/sshmasterconnection.cpp:1825> LOOP FINISHED x2go-DEBUG-../src/sshmasterconnection.cpp:1829> No interaction needed, continue session x2go-DEBUG-../src/sshmasterconnection.cpp:735> Login Check - OK x2go-DEBUG-../src/onmainwindow.cpp:2923> SSH connection established. x2go-DEBUG-../src/onmainwindow.cpp:3336> Continue normal X2Go session x2go-DEBUG-../src/sshprocess.cpp:199> Executing remote command via SshProcess object 0: "x2golistsessions" x2go-DEBUG-../src/sshprocess.cpp:213> this=SshProcess(0x7fd777e90040) Running masterCon->addChannelConnection(this, ' "1333d190-9a79-45cf-81b6-628b053bd257" ', ' "bash -l -c 'echo "X2GODATABEGIN:1333d190-9a79-45cf-81b6-628b053bd257"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; x2golistsessions; echo "X2GODATAEND:1333d190-9a79-45cf-81b6-628b05" '); x2go-DEBUG-../src/sshmasterconnection.cpp:1891> Locking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1893> Passing new channel connection object to channelConnections. x2go-DEBUG-../src/sshmasterconnection.cpp:1895> Unlocking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:2083> Creating new channel. x2go-DEBUG-../src/sshmasterconnection.cpp:2100> New channel:0x7fd7794799b0 x2go-DEBUG-../src/sshmasterconnection.cpp:2185> Executing remote: "bash -l -c 'echo "X2GODATABEGIN:1333d190-9a79-45cf-81b6-628b053bd257"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; x2golistsessions; echo "X2GODATAEND:1333d190-9a79-45cf-81b6-628b053bd257";'" x2go-DEBUG-../src/sshmasterconnection.cpp:2208> New exec channel created. x2go-DEBUG-../src/sshmasterconnection.cpp:2312> EOF on channel 0x7fd7794799b0; SshProcess object: 0 x2go-DEBUG-../src/sshmasterconnection.cpp:2380> EOF sent. x2go-DEBUG-../src/sshmasterconnection.cpp:2384> Channel closed. x2go-DEBUG-../src/sshprocess.cpp:526> SSH finished: raw output (stdout): "X2GODATABEGIN:1333d190-9a79-45cf-81b6-628b053bd257 X2GODATAEND:1333d190-9a79-45cf-81b6-628b053bd257 " x2go-DEBUG-../src/sshprocess.cpp:537> SSH finished: true - "" (0). x2go-DEBUG-../src/onmainwindow.cpp:3804> "" x2go-DEBUG-../src/onmainwindow.cpp:4379> Executing remote command: "X2GODPI=72 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D MATE both" x2go-DEBUG-../src/sshprocess.cpp:199> Executing remote command via SshProcess object 1: "X2GODPI=72 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D MATE both" x2go-DEBUG-../src/sshprocess.cpp:213> this=SshProcess(0x7fd7791cb710) Running masterCon->addChannelConnection(this, ' "2283d650-42e3-4f90-b650-75e02204fb88" ', ' "bash -l -c 'echo "X2GODATABEGIN:2283d650-42e3-4f90-b650-75e02204fb88"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; X2GODPI=72 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9" '); x2go-DEBUG-../src/sshmasterconnection.cpp:1891> Locking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1893> Passing new channel connection object to channelConnections. x2go-DEBUG-../src/sshmasterconnection.cpp:1895> Unlocking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:2083> Creating new channel. x2go-DEBUG-../src/sshmasterconnection.cpp:2100> New channel:0x7fd7791d3130 x2go-DEBUG-../src/sshmasterconnection.cpp:2185> Executing remote: "bash -l -c 'echo "X2GODATABEGIN:2283d650-42e3-4f90-b650-75e02204fb88"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; X2GODPI=72 X2GO_XINERAMA=no x2gostartagent 800x600 adsl 16m-jpeg-9 unix-kde-depth_32 us query 0 D MATE both; echo "X2GODATAEND:2283d650-42e3-4f90-b650-75e02204fb88";'" x2go-DEBUG-../src/sshmasterconnection.cpp:2208> New exec channel created. x2go-DEBUG-../src/sshmasterconnection.cpp:2312> EOF on channel 0x7fd7791d3130; SshProcess object: 1 x2go-DEBUG-../src/sshmasterconnection.cpp:2380> EOF sent. x2go-DEBUG-../src/sshmasterconnection.cpp:2384> Channel closed. x2go-DEBUG-../src/sshprocess.cpp:526> SSH finished: raw output (stdout): "X2GODATABEGIN:2283d650-42e3-4f90-b650-75e02204fb88 X2GODATAEND:2283d650-42e3-4f90-b650-75e02204fb88 " x2go-DEBUG-../src/sshprocess.cpp:532> Have stderr only, something must be wrong. x2go-DEBUG-../src/sshprocess.cpp:537> SSH finished: false - "Failed to start X2Go Agent session with ID user-50-1551738353_stDMATE_dp32. X2Go Agent terminated unexpectedly. Aborting session startup. " (1). x2go-DEBUG-../src/onmainwindow.cpp:5214> Agent output: "Failed to start X2Go Agent session with ID user-50-1551738353_stDMATE_dp32. X2Go Agent terminated unexpectedly. Aborting session startup. " 2019-03-04 17:25:58.855 x2goclient[7115:143542] modalSession has been exited prematurely - check for a reentrant call to endModalSession: x2go-DEBUG-../src/onmainwindow.cpp:6425> Setting focus. My .bashrc and .bash_profile do not output anything that might give rise also to the “Have stderr only, something must be wrong”. Other things that might be interesting: The user session folder seems to be created properly and populated with all the relevant files: keyboard options session.log sshd.pid state Everything is owned by the user and I don’t seem to be able to find any permission issues. The session.log is rather interesting running as X2Go Agent running as X2Go Agent running as X2Go Agent running as X2Go Agent running as X2Go Agent running as X2Go Agent running as X2Go Agent running as X2Go Agent NXAGENT - Version 3.5.99.17 Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com) Copyright (c) 2008-2014 Oleksandr Shneyder <o.shneyder(a)phoca-gmbh.de> Copyright (c) 2011-2016 Mike Gabriel <mike.gabriel(a)das-netzwerkteam.de> Copyright (c) 2014-2016 Ulrich Sibiller <uli42(a)gmx.de> Copyright (c) 2014-2016 Mihai Moldovan <ionic(a)ionic.de> Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com) See https://github.com/ArcticaProject/nx-libs for more information. Info: Agent running with pid '59135'. Session: Starting session at 'Mon Mar 4 17:25:55 2019'. Error: Aborting session with 'Unable to open display 'nx/nx,options=/tmp/.x2go-user/C-user-50-1551738353_stDMATE_dp32/options:50''. Session: Aborting session at 'Mon Mar 4 17:25:55 2019'. Session: Session aborted at 'Mon Mar 4 17:25:55 2019'. Any ideas would be more than welcome. Thank you

1 0

Windows x2goclient and space in windows username
by Norman Gaywood 03 Mar '19

03 Mar '19

It seems now that if a windows user of x2goclient has a space in their username on their local windows system, x2goclient will logout immediately after logging in. This bug report I think is reporting this: https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=1363 "Windows 10 version 1809 breaks X2go, can't read user name with space." I've had a few users experiencing this recently. Wondering if it's new or I've never noticed this. -- Norman Gaywood, Computer Systems Officer School of Science and Technology University of New England Armidale NSW 2351, Australia ngaywood(a)une.edu.au http://turing.une.edu.au/~ngaywood Phone: +61 (0)2 6773 2412 Mobile: +61 (0)4 7862 0062 Please avoid sending me Word or Power Point attachments. See http://www.gnu.org/philosophy/no-word-attachments.html

1 0

Speed
by Robert Dinse 01 Mar '19

01 Mar '19

Was discussing how used to be able to watch videos on early x2go but not anymore. It was said to be a firefox issue. I found an interesting note in a vnc article but it might be applicable to x2go: On XFree86/Xorg it is actually possible to increase the framebuffer read speed considerably (10-100 times) by using the Shadow Framebuffer (a copy of the framebuffer is kept in main memory and this can be read much more quickly.) To do this one puts the line Option "ShadowFB" "true" in the Device section of the /etc/X11/XF86Config or /etc/X11/xorg.conf file. Note that this disables 2D acceleration at the physical display and so that might be unacceptable if one plays games, etc. on the machine's local display. Nevertheless this could be handy in some circumstances, e.g. if the slower speed while sitting at the physical display was acceptable (this seems to be true for most video cards these days.) Unfortunately it does not seem shadowfb can be turned on and off dynamically... Wonder if tweaking with this could benefit x2go response? -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- 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.

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