x2go-user

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Sessions can't be suspended, disconnected sessions can't be resumed.
by Hakan Bayındır 19 Mar '22

19 Mar '22

Hello all, I'm having a strange problem with a long-running X2Go installation. Users cannot resume their "disconnected" sessions. The client/server starts a new, clean one for them. I've debugged the issue but I was unable to paint a coherent picture. Here what I've found: - Disconnected sessions are still active and they're in suspended state. / tmp/.x2go-$USER/$SESSIONPATH/state files show "SUSPENDED" for the same sessions which are running at the background. - However "TERMINATED" sessions are not cleaned. They've piled up. - "x2golistsessions_root" returns empty, even if there are active, running sessions. Running "x2golistsessions" under a session via user also returns empty. - The SQLite3 database in /var/lib/x2go is empty except "used_ports" table. Even in that table there are stale entries, but the list is not very long. - x2gocleansessions logs only show usual session startup woes. - unresumable sessions show that the connection has disconnected unexpectedly, hence X2Go did normal resuming operations. - Suspending a session via client fails. Clicking close button does nothing, right clicking to tray icon and selecting suspend shows an error dialogue: "Failed to suspend with session ID $USERNAME-$DISPLAY-$ID-$DE-$COLORDEPTH" (It's properly populated, so the ID is there). The thing is getting more complicated since none of the commands have help, verbose outputs and cannot debug anything very deeply. I've deployed this thing to much larger systems before, and it was also working flawlessly here, and I'm at loss currently. Lastly, the OS is CentOS 7, and it's updates to top patch level, including the latest X2Go server release done a today or a couple of days ago. Any help is greatly appreciated, Cheers, Hakan

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packages.x2go.org ipv6 problem
by richard lucassen 18 Mar '22

18 Mar '22

I have no idea where to report but the ipv6 stack of packages.x2go.org does not reply: $ host packages.x2go.org packages.x2go.org is an alias for ymir.das-netzwerkteam.de. ymir.das-netzwerkteam.de has address 148.251.201.107 ymir.das-netzwerkteam.de has IPv6 address 2a01:4f8:202:1381::107 $ telnet packages.x2go.org 80 Trying 2a01:4f8:202:1381::107... ^C $ telnet -4 packages.x2go.org 80 Trying 148.251.201.107... Connected to ymir.das-netzwerkteam.de. Escape character is '^]'. ^] telnet> q Connection closed. R. -- richard lucassen http://contact.xaq.nl/

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webgl on a browser through x2go
by Brent S. Elmer Ph.D. 14 Mar '22

14 Mar '22

When I try to run a web browser through an x2go session, I get an error in the browser saying webgl is not enabled. Is there any way to make this work or will it not work through x2go? Brent

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x2go HTML client
by Dj ZU 02 Mar '22

02 Mar '22

Hi there, I am trying to set up x2go HTML client on Ubuntu server following instructions provided there: https://wiki.x2go.org/doku.php/wiki:advanced:x2gohtmlclient Nginx web server configuration is OK. After hitting "START X2GO CLIENT", I see the splash screen and the message "Connecting as <USER> to <SERVER>...". Firefox browser console outputs the following error: Uncaught SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data onreadystatechange https:// <SERVER>/assets/js/x2gokdriveclient.min.js:500 startXHRRequest https://<SERVER>/assets/js/x2gokdriveclient.min.js:496 startX2GoConnection https:// <SERVER>/assets/js/x2gokdriveclient.min.js:512 setStartCallback https://<SERVER>/assets/js/x2gokdriveclient.min.js:44 setStartCallback https://<SERVER>/assets/js/x2gokdriveclient.min.js:41 X2GoHTMLClient https://<SERVER>/assets/js/x2gokdriveclient.min.js:494 main https://<SERVER>/assets/js/x2gokdriveclient.min.js:538 <anonymous> https://<SERVER>/assets/js/x2gokdriveclient.min.js:539 I read this thread: https://lists.x2go.org/pipermail/x2go-user/2021-May/006526.html But I also read this: https://wiki.x2go.org/doku.php/wiki:development:roadmap Should I build x2gokdrive or should I give up? Thanks and best regards, Jérôme

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Re: [X2Go-User] X2Go Window is Frozen When Connecting to RockyLinux 8.5 System Running XFCE
by Joe W 27 Feb '22

27 Feb '22

Turning off compositing fixed it. Thanks! ________________________________ From: Norman Gaywood <Norm.Gaywood(a)une.edu.au> Sent: Sunday, February 27, 2022 4:17 PM To: Joe W <jsw140(a)hotmail.com>; x2go-user(a)lists.x2go.org <x2go-user(a)lists.x2go.org> Subject: Re: X2Go Window is Frozen When Connecting to RockyLinux 8.5 System Running XFCE Two things to check: - Make sure compositing is disabled: https://gitlab.xfce.org/xfce/xfwm4/-/issues/551 - Disable the the screen saver. xfce4-screensaver and xscreensaver I found both these hang an x2go session. ________________________________________ From: x2go-user <x2go-user-bounces(a)lists.x2go.org> on behalf of Joe W <jsw140(a)hotmail.com> Sent: Monday, 28 February 2022 2:19 AM To: x2go-user(a)lists.x2go.org Subject: [X2Go-User] X2Go Window is Frozen When Connecting to RockyLinux 8.5 System Running XFCE I am having a problem with connecting via X2Go with a system that I just installed Rocky Linux 8.5 onto. I am using the XFCE desktop. I have included the debug log. It opens to the desktop but then the window is basically frozen. The most I can do is open a terminal and it takes many seconds to do that. In the debug window the following two lines are being continuously repeated over and over: x2go-DEBUG-../src/onmainwindow.cpp:11224> "Searching proxy window: X2GO-abc-59-1645974877_stDXFCE_dp32" x2go-DEBUG-../src/onmainwindow.cpp:12829> "Searching window with title: X2GO-abc-59-1645974877_stDXFCE_dp32" X2go on server is 4.1.0.3 X2go client on windows 10 system is 4.1.2.0 I have had problems connecting to other systems with the 4.1.2.2 Windows client so I am using an older one. Any ideas what is going on and how to fix? Thanks

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X2Go Window is Frozen When Connecting to RockyLinux 8.5 System Running XFCE
by Joe W 27 Feb '22

27 Feb '22

I am having a problem with connecting via X2Go with a system that I just installed Rocky Linux 8.5 onto. I am using the XFCE desktop. I have included the debug log. It opens to the desktop but then the window is basically frozen. The most I can do is open a terminal and it takes many seconds to do that. In the debug window the following two lines are being continuously repeated over and over: x2go-DEBUG-../src/onmainwindow.cpp:11224> "Searching proxy window: X2GO-abc-59-1645974877_stDXFCE_dp32" x2go-DEBUG-../src/onmainwindow.cpp:12829> "Searching window with title: X2GO-abc-59-1645974877_stDXFCE_dp32" X2go on server is 4.1.0.3 X2go client on windows 10 system is 4.1.2.0 I have had problems connecting to other systems with the 4.1.2.2 Windows client so I am using an older one. Any ideas what is going on and how to fix? Thanks

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font path not set correctly
by Hanno Foest 19 Feb '22

19 Feb '22

Hi, after setting up a new remote x2go instance (using Devuan) I noticed that xterm complained xterm: cannot load font "-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-iso10646-1" I traced the issue to the font path (displayed with xset q) missing /usr/share/fonts/X11/misc, so I added it with xset +fp /usr/share/fonts/X11/misc and things started behaving normally again. - But: Where is the font path in x2go actually being set? I'm not sure if some autoconfiguration failed, or if it's a compile time issue, or something else. - For the same issue there's a bug report in Ubuntu, see https://bugs.launchpad.net/ubuntu/+source/x2goserver/+bug/1891825 and especially the remark about the man page at the end. Hanno

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Display Going Black When Clicking on Certain Windows on remote system
by Joe W 30 Jan '22

30 Jan '22

I use X2Go to connect from my local Linux system to some remote Centos 7 systems where I run Cadence Virtuoso software. As far as I know the systems and X2Go are set up the same. Systems have the latest OS patches. X2go was installed from Epel repo. client is v. 4.1.1.1-1.el7 server is4.1.0.3-9.el7 There is one system that I connect to where when I start the X2Go session then the screen goes black for a second or two. When I run Virtuoso on that system then whenever I click on the main Virtuoso window or a Virtuoso graphics window then my screen goes black. If I click outside the Virtuoso window then the screen reappears. If I click on the Virtuoso library manager window then the screen stays on. Note that I am running X2Go windowed but my entire screen goes black, not just the X2go window. Any suggestions what could be going wrong and how to debug it? I do not know how to turn on debugging in the Linux version. I am wondering if it is something weird with the color palette since it only happens for certain windows. I can connect to other systems without issue that are set up the same. Thanks

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X2Go TCE pxe complications
by MacGregor Family 30 Jan '22

30 Jan '22

Hello, I have been given a couple of Termtek TK-3550 thin clients and I am trying to set them up to open into my Ubuntu 20.04 server at my home over our ethernet LAN. These devices don't have much memory so I have been following the instructions to install the "Classic, NFS- filesystem-based X2Go TCE". I have setup a Virtual Box VM, running Ubuntu 20.04 with a bridged network adapter and a permanent IP address, to be the pxe server. I have followed the instructions as best I was able but I am still having difficulties. I think one problem is likely to be that our cheap router, which provides our DHCP server, does not allow me to nominate the "next- server" or the filename. In an attempt to address this I have installed dnsmasq on the pxe server VM and am running dnsmasq. The dnsmasq.conf is as follows: port=0 log-dhcp dhcp-range=192.168.1.0,proxy dhcp-boot=pxelinux.0 enable-tftp tftp-root=/srv/tftp (I have also tried tftp- root=/opt/x2gothinclient/chroot on this line) The thin client is set to boot over LAN and the dhcp-log on the pxe server looks like this when I turn the thin client on: I'm clearly a complete novice but it seems the thin client is finding its way to the pxe server. Unfortunately the thin client trys to boot until it times out, reporting: "No boot filename received". It then just boots its decades old version of Windows CE. Note that when I changed the tftp-root path in dnsmasq from /opt/x2gothinclient/chroot to /srv/tftp it had some effect on the dhcp log (it nominated its terminal id in a second line) but the nett result did not change. I should add that I have exported both /opt/x2gothinclient/chroot and /srv/tftp with the NFS server. I only switched to /srv/tftp because that's where pxelinux.0 is and I assume that is the file it is looking for and failing to find. Basically I have been trying to get this working for a couple of days without success, I have decided to seek expert help. I apologise for my ignorance, I understand that hobbists like myself are probably incredibly annoying. Regards Stuart MacGregor

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Re: [X2Go-User] x2go-user Digest, Vol 93, Issue 15
by Sherry Leithner 29 Jan '22

29 Jan '22

Thank you for your quick response, looks like we need to update nx_libs /tmp/x2go-username have grown to: 2.7G /tmp/.x2go-aharper 1.6G /tmp/.x2go-iobrien We are currently running: nx-libs.x86_64 3.5.99.25-2.el7 @epel7-x86_64-20210128 Sincerely, Sherry Leithner Computer Systems Specialist Petroleum Abstracts At The University of Tulsa 918-631-3011 Cell: 918-691-1738 ________________________________ From: x2go-user <x2go-user-bounces(a)lists.x2go.org> on behalf of x2go-user-request(a)lists.x2go.org <x2go-user-request(a)lists.x2go.org> Sent: Friday, January 28, 2022 5:00 AM To: x2go-user(a)lists.x2go.org <x2go-user(a)lists.x2go.org> Subject: x2go-user Digest, Vol 93, Issue 15 Send x2go-user mailing list submissions to x2go-user(a)lists.x2go.org To subscribe or unsubscribe via the World Wide Web, visit https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.x2g… 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. Change TMPDIR from /tmp to /app (Sherry Leithner) 2. Re: Change TMPDIR from /tmp to /app (Ulrich Sibiller) ---------------------------------------------------------------------- Message: 1 Date: Thu, 27 Jan 2022 14:17:01 +0000 From: Sherry Leithner <Sherry.Leithner(a)energyabstracts.com> To: "x2go-user(a)lists.x2go.org" <x2go-user(a)lists.x2go.org> Subject: [X2Go-User] Change TMPDIR from /tmp to /app Message-ID: <DM6PR08MB3948C388A3EF20424403D884E8219(a)DM6PR08MB3948.namprd08.prod.outlook.com> Content-Type: text/plain; charset="iso-8859-1" x2go creates large files in /tmp/.x2go-username when a session is saved. This is causing us difficulty because /tmp is filling up and users cannot log in. Our /tmp directory is too small and I don't have access to increase it currently. We need to change the default tmp directory from /tmp to /app. I have set TMPDIR in my .profile, /etc/profile and also in /etc/x2go/Xsession to /app .profile export TMPDIR=/app/ Xsession variables initialize variables for use by all session scripts OPTIONFILE=/etc/x2go/Xsession.options SYSRESOURCES=/etc/x2go/Xresources USRRESOURCES=$HOME/.Xresources-x2go SYSSESSIONDIR=/etc/x2go/Xsession.d USERXSESSION=$HOME/.xsession-x2go USERXSESSIONRC=$HOME/.xsessionrc-x2go ALTUSERXSESSION=$HOME/.Xsession-x2go ERRFILE="${HOME}/.xsession-x2go-${cur_hostname}-errors" TMPDIR=/app The session still creates the tmp files in /tmp The x2go process which is running: leithner 16137 1 0 11:23 ? 00:00:00 sshfs -o idmap=user,uid=1007,gid=1001,default_permissions,ServerAliveInterval=300,IdentityFile=/home/leithner/.x2go/ssh/key.p14092,UserKnownHostsFile=/home/leithner/.x2go/ssh/key.p14092.ident SLeithne@127.0.0.1:/cygdrive/C/Users/SLeithne/X2GO~1/S-2E61~1/spool /tmp/.x2go-leithner/spool/C-leithner-50-1643045018_stDXFCE_dp32 -p 50660 leithner@entrada:/app$ echo $TMPDIR /app Where should I be changing this variable? Can it be changed? Thank you for any help. Sincerely, Sherry Leithner Computer Systems Specialist Petroleum Abstracts At The University of Tulsa 918-631-3011 Cell: 918-691-1738

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