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2322 discussions

X2Go server, nxagent causes segfault
by Kalle Tuulos 20 Mar '18

20 Mar '18

Hello I'm using X2Go server in several computers, all running Ubuntu. Just today, one of my computers (headless Linux box) just froze and I had to give it a power cycle reset. After powering up again, I can't any more connect to X2Go. I'm getting following into /var/log/syslog: ---8<---8<--- Mar 12 13:15:40 kallebuntu systemd[1]: Started Session 10 of user ktuulos. Mar 12 13:15:49 kallebuntu /usr/sbin/x2gocleansessions[1091]: ktuulos-50-1520853345_stDLXDE_dp32: state file for this session does not exist: /tmp/.x2go-ktuulos/C-ktuulos-50-1520853345_stDLXDE_dp32/state (this can be ignored during session startups) Mar 12 13:15:51 kallebuntu /usr/bin/x2gostartagent: successfully started X2Go Agent session with ID ktuulos-50-1520853345_stDLXDE_dp32 Mar 12 13:15:58 kallebuntu kernel: [ 1315.845394] nxagent[9647]: segfault at 8 ip 000056286f70db3a sp 00007ffea2bd1bc0 error 4 in nxagent[56286f693000+432000] Mar 12 13:16:04 kallebuntu /usr/bin/x2gosetkeyboard: Setting X keyboard according to /home/ktuulos/.x2go/C-ktuulos-50-1520853345_stDLXDE_dp32/keyboard Mar 12 13:16:05 kallebuntu /usr/bin/x2goruncommand: launching session with Xsession-x2go mechanism, using STARTUP="startlxde" Mar 12 13:16:05 kallebuntu /usr/bin/x2goruncommand: dbus wrapper available as /usr/bin/dbus-run-session ---8<---8<--- This computer is running Ubuntu 16.04. X2go server has been installed using the ppa method. ---8<---8<--- ktuulos@kallebuntu:~$ uname -a Linux kallebuntu 4.13.0-36-generic #40~16.04.1-Ubuntu SMP Fri Feb 16 23:25:58 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux ktuulos@kallebuntu:~$ dpkg -s x2goserver | grep Version Version: 4.1.0.0-0~1517~ubuntu16.04.1 ktuulos@kallebuntu:~$ cat /etc/apt/sources.list.d/x2go-ubuntu-stable-xenial.list deb http://ppa.launchpad.net/x2go/stable/ubuntu xenial main # deb-src http://ppa.launchpad.net/x2go/stable/ubuntu xenial main ---8<---8<--- There seem to be no hardware problems - I installed mcelog and I'm now monitoring its output. Nothing. Could anyone give some hints? I have spent the last hour googling about "nxagent segfault", but I haven't found anything, which would help. Thanks, Kalle

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Best client/server pairings for RHEL 6 server and linux/windows clients?
by John Stoffel 20 Mar '18

20 Mar '18

Guys, I'm using x2go server on a CentOS 6.9 box, kept quite upto date, and I have no problems connecting to it from both the desktop of that system, and from home when I'm connecting in from a Linux desktop. My versions are: Server (Linux CentOS 6.9): x2goclient-4.0.1.4-1.el6.x86_64 x2goserver-4.0.1.20-1.el6.x86_64 x2golxdebindings-debuginfo-1.0.2.4-1.1.x86_64 x2goserver-xsession-4.0.1.20-1.el6.x86_64 python-x2go-0.5.0.3-1.el6.noarch x2goagent-3.5.0.32-3.1.x86_64 Linux Client (Linux Mint 18.3): ii nxproxy 2:3.5.0.33-0x2go1+git20180204.776+8.main.1 amd64 NX proxy ii x2go-keyring 2012.07.23~jessie~main~17~build1 all GnuPG keys of all X2Go developers and the X2Go archive ii x2goclient 4.1.1.1-0x2go1+git20180302.1732+8.main.1 amd64 X2Go Client application (Qt4) But when I try to use the latest client stuff from my Windows 7 system, I just get a connection which shows up for a second, then disconnects and returns me to the connection screen. I can't figure out what I'm doing wrong. But I'm loathe to upgrade my server just in case I break a working setup. In the meantime I've built a new CentOS-7.4 system, which is using the same packages as my CentOS 6.9 server, but for some reason I just can't reliably connect there either. Been following the mailing list for a while, since this is really my best option to be able to have my linux sessions travel around with me. But debugging has been a chore, since there are so many files and places which need to be looked into. And it's not clear WHY connections fail. And actually, does RHEL/CentOS 7 with a Gnome desktop even work? Is there an issue with OpenGL like there is with VNC desktops? Thanks, John

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x2go problems - Ubuntu 16.04 - before and after new version upgrade
by Steven Spencer 19 Mar '18

19 Mar '18

Greetings, I sent this yesterday, but was not a member of the list, so wasn't sure if it would end up being approved and posted or not. Here's the content of that message and I apologize if this is a duplicate: We use x2go extensively for some access to some Ubuntu based LTSP servers. Suddenly over the last two days, we get the following in the client: "The remote proxy closed the connection while negotiating the session. This may be due to the wrong authentication credentials passed to the server." And on the server we are trying to connect to, we see this in the logs: /usr/bin/x2goresume-session: client [ip.address.of.client] has successfully resumed session with ID kscadmin-51-1520534328_stDMATE_dp24 /usr/bin/x2gosetkeyboard: /home/ksca0dmin/.x2go/C-kscadmin-51-1520534328_stDMATE_dp24/keyboard did not appear within 30s after agent startup We are never able to connect. This happens even on all servers that we connect to and includes older server versions: x2goagent: 3.5.0.33 x2goserver: 4.0.1.22 x2goserver-extensions: 4.0.1.22 x2goserver-xsession: 4.0.1.22 As well as newer ones: x2goserver: 4.1.0.0 x2goserver-common: 4.1.0.0 x2goserver-extensions: 4.1.0.0 x2goserver-fmbindings: 4.1.0.0 x2goserver-printing: 4.1.0.0 x2goserver-x2goagent: 3.5.99.14 x2goserver-xsession: 4.1.0.0 Unfortunately, the clients are now updated as well trying to fix this issue, but they were failing on the older client version as well: X2Go Client v. 4.1.1.1 (Qt - 4.8.7) Any help would be appreciated. Thanks, -- -- Steven G. Spencer, Network Administrator KSC Corporate - The Kelly Supply Family of Companies Office 308-382-8764 Ext. 1131 Mobile 402-765-8010

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open another customizing Port Forward thought the SSH Connection to the x2go Server
by Feustel, Thomas 19 Mar '18

19 Mar '18

Hi, Is it possible to open an induvial port forward from the client machine to the x2go server? I need this for a windows software to connect to the Linux server. My first approach wars to use on the client a ssh_config, but the client creates the connection directly from the x2go client application with some ssh libs. So ok, the next approach wars to use the ssh_config on the Linux site, because for the printer and the file connection, the server open a ssh connection to a ssh-Daemon on the Client site. But the ssh connection use the option "ClearAllForwardings", so the forwards on a config-file are not working. So someone have an idea for this topic? Greetings

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Some questions about X2go
by Torsten Kupke 19 Mar '18

19 Mar '18

Hi all, on my working PC there is running Ubuntu 16.04 with MATE Desktop (isn't the same as Ubuntu MATE, right?) and a X2go Server with Desktop Sharing extension. On my home PC with Windows 10 I have installed the X2go Client and inside it configured a session connecting to the Ubuntu host according to https://wiki.x2go.org/doku.php/doc:usage:desktop-sharing. The connection is successful, but there are some issues: 1. The Ubuntu host's desktop is spread over two 4/3 screens. But The Windows PC only has one screen with 1680x1050 Pixels. So the display from the Ubuntu host is highly horizontally compressed, so that the texts are nearly unreadable. OK, this behaviour is documented, but is there a way to get it more readable? 2. If I (to solve the above issue) switch to something other than full screen mode in the session settings, the session crashes, when started. I have to close and restart the X2go Client. And then with settings set back to full screen mode the session runs again. Is there a way to avoid the crash without full screen mode? 3. In full screen mode I cannot see any mouse cursor. So hitting any user elements inside or on the windows inside the display from the Ubuntu host is very difficult, since they are reduced to half the width. Is there a way to see a mouse cursor? Or is this due to the compressed display? 4. Since mouse using is so difficult, I tried to close the windows from the Ubuntu host by pressing <Alt><F4>. But then I get a question from X2go to close the session. Is there a way to propagate key combinitions like <Alt><F4> to the remote host? Sincerely tkansgar

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Deprecation and removal of X2Go Plugin
by Mihai Moldovan 19 Mar '18

19 Mar '18

Hi Since most browsers either stopped supporting NPAPI (or will be dropping support with the next ESR version) and Qt 5 does not feature a browser plugin architecture any longer, I will be ripping out code related to the X2Go Plugin in the development version of X2Go Client soonish. Expect the next version to not supply X2Go Plugin binaries. Mihai

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Problems with X2go keyboard layout
by Thomas Stephan 15 Mar '18

15 Mar '18

Dear X2golist, we are using X2go to connect to our Ubuntu workstations from various clients. Since some days we had problems to get connected, now after updating client and server we can connect again. After connecting to the server we see the window with the desktop, and are able to start programs as usual. However, the keyboard seems to deliver random results, e.g. the keys 1,2,3,4,5,6 map to e,r,t,z,<enter> in a terminal on the remote-server. Here is our setup: Client is MAC OSX 10.11, running x2goclient 4.1.1.1 for MAC OS X 10.10 Server: Ubuntu 16.04.4 LTS (Xenial Xerus) output from x2goversion on the server is cups-x2go: 3.0.1.3 x2godesktopsharing: 3.1.1.4 x2goserver: 4.1.0.0 x2goserver-common: 4.1.0.0 x2goserver-extensions: 4.1.0.0 x2goserver-fmbindings: 4.1.0.0 x2goserver-printing: 4.1.0.0 x2goserver-x2goagent: 3.5.99.15 x2goserver-xsession: 4.1.0.0 Any ideas? Thanks, Thomas -- Dr. Thomas Stephan Arbeitsgruppe für funktionelle, strukturelle und molekulare Bildgebung Neurologisches Forschungshaus Klinikum Grosshadern Feodor-Lynen-Str. 19 81377 München Thomas.Stephan at lrz.uni-muenchen.de +49 89 4400-74819 (Fon) +49 89 4400-74801 (Fax)

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Can we have some old rpms in the x2go.repo?
by Norman Gaywood 15 Mar '18

15 Mar '18

Last night after upgrading several Fedora 27 systems with the latest http://packages.x2go.org/fedora/$releasever/main/$basearch nxagent now segfaults sometimes on connection, sometimes when doing a move of the x2goclient screen. Problem is, I can't roll back to the previous version (to test) as the repo does not contain the older rpms? Would it be possible to have a version or two to be able to do a "dnf downgrade"? Cheers. -- 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

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Problems after upgrading to recent x2go-server and x2go client releases
by h i 15 Mar '18

15 Mar '18

Hello, I've been experiencing problems with opening applications and resizing my x2go client window after installing the newest version x2go-server. The issues occurs on Ubuntu 14.04 and 16.04. What happens now is that every time I maximize my x2go-client window, the images on screen rapidly flicker and won't stop until I minimize the screen. Also, each time I move the window, a quick flicker occurs across the screen. This never occurred before this new release. I have a few systems with the current x2go verison installed, here is the output: x2goversion x2goserver: 4.1.0.0 x2goserver-common: 4.1.0.0 x2goserver-extensions: 4.1.0.0 x2goserver-fmbindings: 4.1.0.0 x2goserver-printing: 4.1.0.0 x2goserver-x2goagent: 3.5.99.14 x2goserver-xsession: 4.1.0.0 We have another system running x2go server, but have yet to update it due to the problems we've experienced. Here is the output of the previous version we are running without the issues: x2goversion x2goagent: 3.5.0.33 x2goserver: 4.0.1.22 x2goserver-extensions: 4.0.1.22 x2goserver-xsession: 4.0.1.22 On the client side, I upgraded to the 4.1.1.1 from 4.1.0.0 and experienced some issues. I have to click on the outside/top-right edge of the session panel for the login session window to appear. Any thing closer to the middle, and it won't respond. I also get a pop-up message about the sound that I had not experienced with previous versions. Once logged into a session, the flickering resulting from moving/maximizing the window is much worse. Fortunately, I was able to revert back to x2go-client 4.1.0.0. However,is there a way to revert back to this previous version/configuration of x2goserver. Right now, it is has been a lot of flickering while to trying to do routine tasks with the current release. Any insight would be appreciated. Thanks. H.

3 7

Can't install X2goserver on Debian 9
by Nigra Truo 15 Mar '18

15 Mar '18

This is my main system, where I use X2goserver every day of the week and have done so for years, it worked really well for many years now. After doing the newest x2goserver update, several things broke and I can't install x2go anymore. So I decided to clean up any old install, purged everything. Purge complained that directories were not empty. Then, after I erased the directories, it complains that they are not there (apt is super annoying at times where you can't get it right, no matter how you try). Now I'm stuck, can't install or deinstall: When installing, I get: X2Go is configured to use a non-SQLite DB backend, leaving the database alone (who configure that? I definitely not. There should not be a piece of x2go configuration left on the system, the whole point of the purge) Then the installer fails, because it probably does not have any db to work with? --------------------------------------------------------------------------- Created symlink /etc/systemd/system/multi-user.target.wants/x2goserver.service → /lib/systemd/system/x2goserver.service. Job for x2goserver.service failed because the control process exited with error code. See "systemctl status x2goserver.service" and "journalctl -xe" for details. invoke-rc.d: initscript x2goserver, action "start" failed. ● x2goserver.service - X2Go Server Daemon Loaded: loaded (/lib/systemd/system/x2goserver.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Mon 2018-03-12 17:47:07 PDT; 7ms ago Process: 27309 ExecStart=/usr/sbin/x2gocleansessions (code=exited, status=255) --------------------------------------------------------------------------------- Now I still can't purge the config, when it complains that it has no directory to rm, I create the dir, yet it erases it, then complains that it is not there, which is the oddest thing ever: # apt purge x2goserver Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are no longer required: libjlha-java libx2go-log-perl libx2go-server-db-perl libx2go-server-perl libxcompshad3 linux-headers-4.9.0-4-amd64 linux-headers-4.9.0-4-common linux-headers-4.9.0-5-amd64 linux-headers-4.9.0-5-common nxagent x2goserver-common x2goserver-x2goagent Use 'apt autoremove' to remove them. The following packages will be REMOVED: x2goserver* x2goserver-extensions* x2goserver-fmbindings* x2goserver-printing* x2goserver-xsession* 0 upgraded, 0 newly installed, 5 to remove and 2 not upgraded. 5 not fully installed or removed. After this operation, 730 kB disk space will be freed. Do you want to continue? [Y/n] (Reading database ... 660010 files and directories currently installed.) Removing x2goserver-xsession (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... Removing x2goserver-printing (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... Removing x2goserver-extensions (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... Removing x2goserver-fmbindings (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... Error in file "/usr/share/applications/evince.desktop": "" is an invalid MIME type ("" does not contain a subtype) Removing x2goserver (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... Processing triggers for mime-support (3.60) ... Processing triggers for desktop-file-utils (0.23-1) ... Processing triggers for doc-base (0.10.7) ... Processing 4 removed doc-base files, 2 added doc-base files... Error while merging /usr/share/doc-base/kino-en with /usr/share/doc-base/kino-fr: format html already defined. Registering documents with scrollkeeper... Processing triggers for man-db (2.7.6.1-2) ... Processing triggers for shared-mime-info (1.8-1) ... Unknown media type in type 'all/all' Unknown media type in type 'all/allfiles' Processing triggers for gnome-menus (3.13.3-9) ... (Reading database ... 659820 files and directories currently installed.) Purging configuration files for x2goserver-printing (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... Purging configuration files for x2goserver-xsession (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... Purging configuration files for x2goserver-fmbindings (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... Error in file "/usr/share/applications/evince.desktop": "" is an invalid MIME type ("" does not contain a subtype) Purging configuration files for x2goserver (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... rmdir: failed to remove '/etc/x2go': No such file or directory dpkg: error processing package x2goserver (--purge): subprocess installed post-removal script returned error exit status 1 Errors were encountered while processing: x2goserver needrestart is being skipped since dpkg has failed E: Sub-process /usr/bin/dpkg returned an error code (1) ------------------------------------------------------------------------------------------------ so I create /etc/x2go mkdir /etc/x2go execute purge again and get the same error: Purging configuration files for x2goserver (4.1.0.0-0x2go1.2+git20180302.1517+9.main.1) ... rmdir: failed to remove '/etc/x2go': No such file or directory # ls /etc/x2go ls: cannot access '/etc/x2go': No such file or directory ------------------------------------------------------------- But anyway, even when all config is removed from the system, I still can't install it, I still get the configuration message for the db. -- *Por sperto kaj lerno ne sufiĉas eterno.*

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