<div dir="auto">Sorry, no time right now..will read later. But the correct call is "nxagent :55". My fault...<div dir="auto"><br></div><div dir="auto">Uli</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Robert Kudyba <<a href="mailto:rkudyba@fordham.edu">rkudyba@fordham.edu</a>> schrieb am Mi., 19. Aug. 2020, 21:18:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr">nxagent -display :55<br><br>NXAGENT - Version 3.5.99.24<br><br>Copyright (c) 2001, 2011 NoMachine (<a href="http://www.nomachine.com" target="_blank" rel="noreferrer">http://www.nomachine.com</a>)<br>Copyright (c) 2008-2014 Oleksandr Shneyder <<a href="mailto:o.shneyder@phoca-gmbh.de" target="_blank" rel="noreferrer">o.shneyder@phoca-gmbh.de</a>><br>Copyright (c) 2011-2016 Mike Gabriel <<a href="mailto:mike.gabriel@das-netzwerkteam.de" target="_blank" rel="noreferrer">mike.gabriel@das-netzwerkteam.de</a>><br>Copyright (c) 2014-2016 Ulrich Sibiller <<a href="mailto:uli42@gmx.de" target="_blank" rel="noreferrer">uli42@gmx.de</a>><br>Copyright (c) 2014-2016 Mihai Moldovan <<a href="mailto:ionic@ionic.de" target="_blank" rel="noreferrer">ionic@ionic.de</a>><br>Copyright (c) 2015-2016 Qindel Group (<a href="http://www.qindel.com" target="_blank" rel="noreferrer">http://www.qindel.com</a>)<br>See <a href="https://github.com/ArcticaProject/nx-libs" target="_blank" rel="noreferrer">https://github.com/ArcticaProject/nx-libs</a> for more information.<br><br>Info: Agent running with pid '894147'.<br>Session: Starting session at 'Wed Aug 19 14:50:26 2020'.<br>Error: Aborting session with 'Unable to open display ':55''.<br>Session: Aborting session at 'Wed Aug 19 14:50:26 2020'.<br>Session: Session aborted at 'Wed Aug 19 14:50:26 2020'.<br></div><div dir="ltr"><br></div><div>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:</div><div>/var/log/dnf.log.1:2020-08-14T13:37:43Z DDEBUG Command: dnf groupinstall -y Xfce Desktop<br>/var/log/dnf.log.1:2020-08-14T13:37:43Z DDEBUG Extra commands: ['groupinstall', '-y', 'Xfce Desktop']<br>/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<br>/var/log/dnf.log.1: greybird-xfce4-notifyd-theme noarch 3.22.12-1.fc32 fedora 22 k<br>/var/log/dnf.log.1: Xfce Desktop<br>/var/log/dnf.log.1: Xfce<br>/var/log/dnf.log.1: greybird-xfce4-notifyd-theme-3.22.12-1.fc32.noarch ibus-qt-1.3.3-24.fc32.x86_64<br>/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</div><div><br></div><div>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:</div><div><br>/var/log/dnf.log.1:2020-08-17T12:38:57Z DEBUG ---> Package <b>xfce4-session.x86_64</b> 4.14.2-1.fc32 will be erased<br>/var/log/dnf.log.1: xfce4-session x86_64 4.14.2-1.fc32 @updates 2.1 M<br></div><div><br></div><div>So a word to the wise...double check what really gets removed with that command!</div><div><br></div><div>Running yum -y groupinstall Xfce fixed the issue. Perhaps some error checking can be improved for this? Any why autoremove would do this?</div><div><br></div><div>As for Gazebo it segfaults on X2Go but not from ssh -X</div><div>gazebo<br>AL lib: (WW) alcCloseDevice: Releasing context 0x55b8fd77ad20<br>AL lib: (WW) alcSetError: Error generated on device (nil), code 0xa002<br></div><div><br></div><div>gzclient[897526]: segfault at 20 ip 00007f161670fcc6 sp 00007ffca9967be0 error 4 in libOgreMain.so.1.9.0[7f161650b000+2f0000]<br>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<br></div><div><br></div><div>I'll report it to their developers but in case anyone finds it useful and they run into this discussion...</div><div><br></div><div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Aug 19, 2020 at 11:49 AM Ulrich Sibiller <<a href="mailto:ulrich.sibiller@gmail.com" target="_blank" rel="noreferrer">ulrich.sibiller@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Robert,<br>
<br>
I am really surprised. "could not open default font fixed" is a rather<br>
old error message. We have removed that years ago:<br>
<br>
commit d981d938dade2967e70322c0bf934efeeb1da716<br>
Author: Mike Gabriel <<a href="mailto:mike.gabriel@das-netzwerkteam.de" target="_blank" rel="noreferrer">mike.gabriel@das-netzwerkteam.de</a>><br>
Date: Sun Feb 5 17:06:55 2017 +0000<br>
<br>
{dix/,hw/nxagent/NX}dixfont.{c,h}: Support using builtin-fonts.<br>
Makes dependency on X11's misc fonts package obsolete.<br>
<br>
(see also <a href="https://github.com/ArcticaProject/nx-libs/issues/84" rel="noreferrer noreferrer" target="_blank">https://github.com/ArcticaProject/nx-libs/issues/84</a>)<br>
<br>
So what nx package is being used on that system?<br>
<br>
If you simply run "nxagent -display :55" on the server (e.g. after<br>
connecting with ssh -X), does that work?<br>
<br>
Uli<br>
<br>
On Wed, Aug 19, 2020 at 3:54 PM Robert Kudyba <<a href="mailto:rkudyba@fordham.edu" target="_blank" rel="noreferrer">rkudyba@fordham.edu</a>> wrote:<br>
><br>
> I've seen the previous discussion about this happening on Gentoo from <a href="https://x2go-dev.x2go.narkive.com/eHuOYxSn/bug-884-nxagent-aborts-session-with-could-not-open-default-font-fixed" rel="noreferrer noreferrer" target="_blank">https://x2go-dev.x2go.narkive.com/eHuOYxSn/bug-884-nxagent-aborts-session-with-could-not-open-default-font-fixed</a> could this be similar?<br>
><br>
> rpm -qa |grep x2go<br>
> x2goagent-4.1.0.3-6.fc32.x86_64<br>
> x2goserver-common-4.1.0.3-6.fc32.noarch<br>
> x2goserver-xsession-4.1.0.3-6.fc32.noarch<br>
> x2goserver-4.1.0.3-6.fc32.x86_64<br>
><br>
> Warning: Cannot read keystroke file '/home/myuser/.x2go/config/keystrokes.cfg'.<br>
> Info: using keystrokes file '/etc/x2go/keystrokes.cfg'<br>
> Info: ignoring unknown keystroke action 'debug_tree'.<br>
> Info: ignoring unknown keystroke action 'regions_on_screen'.<br>
> Info: ignoring unknown keystroke action 'test_input'.<br>
> Info: ignoring unknown keystroke action 'deactivate_input_devices_grab'.<br>
> Currently known keystrokes:<br>
> close_session : Ctrl+Alt+t<br>
> switch_all_screens : Ctrl+Alt+f<br>
> minimize : Ctrl+Alt+m<br>
> resize : Ctrl+Alt+r<br>
> defer : Ctrl+Alt+e<br>
> ignore : Ctrl+Alt+BackSpace<br>
> force_synchronization : Ctrl+Alt+j<br>
> fullscreen : Ctrl+Shift+Alt+f<br>
> viewport_move_left : Ctrl+Shift+Alt+Left<br>
> viewport_move_up : Ctrl+Alt+Up<br>
> viewport_move_right : Ctrl+Alt+Right<br>
> viewport_move_down : Ctrl+Alt+Down<br>
> Error: Aborting session with 'Could not open default font 'fixed''.<br>
><br>
> Aug 19 09:30:04 /usr/bin/x2goruncommand[805082]: ERROR: command failed to execute<br>
> _______________________________________________<br>
> x2go-dev mailing list<br>
> <a href="mailto:x2go-dev@lists.x2go.org" target="_blank" rel="noreferrer">x2go-dev@lists.x2go.org</a><br>
> <a href="https://lists.x2go.org/listinfo/x2go-dev" rel="noreferrer noreferrer" target="_blank">https://lists.x2go.org/listinfo/x2go-dev</a><br>
</blockquote></div></div>
</blockquote></div>