[X2Go-Dev] Fedora 32 X2Go 4.1.0.3-6:Could not open default font 'fixed''

Wed Aug 19 21:17:45 CEST 2020

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 at phoca-gmbh.de>
Copyright (c) 2011-2016 Mike Gabriel <mike.gabriel at das-netzwerkteam.de>
Copyright (c) 2014-2016 Ulrich Sibiller <uli42 at gmx.de>
Copyright (c) 2014-2016 Mihai Moldovan <ionic at 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 at gmail.com>
wrote:

> 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 at 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 at fordham.edu> wrote:
> >
> > I've seen the previous discussion about this happening on Gentoo from
> https://x2go-dev.x2go.narkive.com/eHuOYxSn/bug-884-nxagent-aborts-session-with-could-not-open-default-font-fixed
> 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
> > _______________________________________________
> > x2go-dev mailing list
> > x2go-dev at lists.x2go.org
> > https://lists.x2go.org/listinfo/x2go-dev
>
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