I've seen the previous discussion about this happening on Gentoo from https://x2go-dev.x2go.narkive.com/eHuOYxSn/bug-884-nxagent-aborts-session-wi... could this be similar?
rpm -qa |grep x2go x2goagent-4.1.0.3-6.fc32.x86_64 x2goserver-common-4.1.0.3-6.fc32.noarch x2goserver-xsession-4.1.0.3-6.fc32.noarch x2goserver-4.1.0.3-6.fc32.x86_64
Warning: Cannot read keystroke file '/home/myuser/.x2go/config/keystrokes.cfg'. Info: using keystrokes file '/etc/x2go/keystrokes.cfg' Info: ignoring unknown keystroke action 'debug_tree'. Info: ignoring unknown keystroke action 'regions_on_screen'. Info: ignoring unknown keystroke action 'test_input'. Info: ignoring unknown keystroke action 'deactivate_input_devices_grab'. Currently known keystrokes: close_session : Ctrl+Alt+t switch_all_screens : Ctrl+Alt+f minimize : Ctrl+Alt+m resize : Ctrl+Alt+r defer : Ctrl+Alt+e ignore : Ctrl+Alt+BackSpace force_synchronization : Ctrl+Alt+j fullscreen : Ctrl+Shift+Alt+f viewport_move_left : Ctrl+Shift+Alt+Left viewport_move_up : Ctrl+Alt+Up viewport_move_right : Ctrl+Alt+Right viewport_move_down : Ctrl+Alt+Down Error: Aborting session with 'Could not open default font 'fixed''.
Aug 19 09:30:04 /usr/bin/x2goruncommand[805082]: ERROR: command failed to execute
Hi Robert,
I am really surprised. "could not open default font fixed" is a rather old error message. We have removed that years ago:
commit d981d938dade2967e70322c0bf934efeeb1da716 Author: Mike Gabriel <mike.gabriel@das-netzwerkteam.de> Date: Sun Feb 5 17:06:55 2017 +0000
{dix/,hw/nxagent/NX}dixfont.{c,h}: Support using builtin-fonts.Makes dependency on X11's misc fonts package obsolete.
(see also https://github.com/ArcticaProject/nx-libs/issues/84)
So what nx package is being used on that system?
If you simply run "nxagent -display :55" on the server (e.g. after connecting with ssh -X), does that work?
Uli
On Wed, Aug 19, 2020 at 3:54 PM Robert Kudyba <rkudyba@fordham.edu> wrote:
nxagent -display :55
NXAGENT - Version 3.5.99.24
Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com) Copyright (c) 2008-2014 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de> Copyright (c) 2011-2016 Mike Gabriel <mike.gabriel@das-netzwerkteam.de> Copyright (c) 2014-2016 Ulrich Sibiller <uli42@gmx.de> Copyright (c) 2014-2016 Mihai Moldovan <ionic@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 '894147'. Session: Starting session at 'Wed Aug 19 14:50:26 2020'. Error: Aborting session with 'Unable to open display ':55''. Session: Aborting session at 'Wed Aug 19 14:50:26 2020'. Session: Session aborted at 'Wed Aug 19 14:50:26 2020'.
Alas the error might be a red herring and/or a chance to improve some error/dependency checking. Here's what I did and what fixed it based on dnf logs. Notice I chose XFCE. So last week I ran: /var/log/dnf.log.1:2020-08-14T13:37:43Z DDEBUG Command: dnf groupinstall -y Xfce Desktop /var/log/dnf.log.1:2020-08-14T13:37:43Z DDEBUG Extra commands: ['groupinstall', '-y', 'Xfce Desktop'] /var/log/dnf.log.1:2020-08-14T13:37:47Z DEBUG ---> Package greybird-xfce4-notifyd-theme.noarch 3.22.12-1.fc32 will be installed /var/log/dnf.log.1: greybird-xfce4-notifyd-theme noarch 3.22.12-1.fc32 fedora 22 k /var/log/dnf.log.1: Xfce Desktop /var/log/dnf.log.1: Xfce /var/log/dnf.log.1: greybird-xfce4-notifyd-theme-3.22.12-1.fc32.noarch ibus-qt-1.3.3-24.fc32.x86_64 /var/log/dnf.log.1:2020-08-14T13:37:50Z DDEBUG /var/cache/dnf/fedora-558931b5e76b51a7/packages/greybird-xfce4-notifyd-theme-3.22.12-1.fc32.noarch.rpm removed
I have been trying to get Gazebo the robotics package for ROS 2 to run and it crashes straight away when launching from X2Go. So I ran dnf autoremove and missed a very important clue:
/var/log/dnf.log.1:2020-08-17T12:38:57Z DEBUG ---> Package *xfce4-session.x86_64* 4.14.2-1.fc32 will be erased /var/log/dnf.log.1: xfce4-session x86_64 4.14.2-1.fc32 @updates 2.1 M
So a word to the wise...double check what really gets removed with that command!
Running yum -y groupinstall Xfce fixed the issue. Perhaps some error checking can be improved for this? Any why autoremove would do this?
As for Gazebo it segfaults on X2Go but not from ssh -X gazebo AL lib: (WW) alcCloseDevice: Releasing context 0x55b8fd77ad20 AL lib: (WW) alcSetError: Error generated on device (nil), code 0xa002
gzclient[897526]: segfault at 20 ip 00007f161670fcc6 sp 00007ffca9967be0 error 4 in libOgreMain.so.1.9.0[7f161650b000+2f0000] Aug 19 14:58:59 storm kernel: Code: 00 5b 5d 41 5c 41 5d 41 5e c3 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 55 48 89 e5 41 56 49 89 fe 41 55 41 54 53 48 83 ec 60 <48> 8b 7f 20 64 48 8b 04 25 28 00 00 00 48 89 45 d8 31 c0 48 85 ff
I'll report it to their developers but in case anyone finds it useful and they run into this discussion...
On Wed, Aug 19, 2020 at 11:49 AM Ulrich Sibiller <ulrich.sibiller@gmail.com> wrote:
Hi Robert,
I suspect that xfce4-session rpm will fiddle with the fontpath somehow.
Regarding Gazebo: Chances are that this is related to OpenGL. You can try the libgl workaround described here: wiki:development:glx
Uli
On Wed, Aug 19, 2020 at 9:20 PM Ulrich Sibiller <uli42@gmx.de> wrote:
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Robert Kudyba -
Ulrich Sibiller -
Ulrich Sibiller