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Old 11-02-2018, 09:30 AM   #1
jakubu
LQ Newbie
 
Registered: Nov 2018
Posts: 2

Rep: Reputation: Disabled
headless server with VirtualGL but glxinfo complains


Hello,

I ma trying to set a headless server featured with GPU which would run X11 with OpenGL support through VirtualGL. OS is Slackware 14.2, VirtualGL 2.6, GPU GTX1180 Ti

/etc/initab
id:5:initdefault

Steps are:
# rmmod nvidia_drm nvidia_modeset nvidia_uvm nvidia
# lsmod |grep nvidia
<empty>
# nvidia-xconfig -a --use-display-device=None --virtual=1920x1080
# shutdown -r now
# /opt/VirtualGL/bin/vglserver_config
<defaults>

[user]$ nohup Xvfb :0 -screen 0 1920x1080x24 +extension GLX +render -noreset &
[user]$ xdpyinfo
name of display: :0
version number: 11.0
vendor string: The X.Org Foundation
vendor release number: 11803000
X.Org version: 1.18.3
<...>

$ xdpyinfo | grep GLX
GLX
SGI-GLX

And my concern is:
$ /opt/VirtualGL/bin/glxinfo
name of display: :0
X Error of failed request: BadValue (integer parameter out of range for operation)
Major opcode of failed request: 150 (GLX)
Minor opcode of failed request: 24 (X_GLXCreateNewContext)
Value in failed request: 0x0
Serial number of failed request: 39
Current serial number in output stream: 40

although I am able to start XFCE and connect via x0vncserver

What am I missing?
Regards
Jakub
 
Old 11-06-2018, 05:52 AM   #2
jakubu
LQ Newbie
 
Registered: Nov 2018
Posts: 2

Original Poster
Rep: Reputation: Disabled
Xvfb was a wrong choice. It can't use GPU.
At the moment a workaround is to remotely run xinit as a root:
$ sudo su -
# nohup xinit &
# exit
Since a user would get the error. "/usr/libexec/Xorg.wrap: Only console users are allowed to run the X server"

Then being already a remote user I run
$ nohup .vnc/xstartup &

$ cat .vnc/xstartup
#!/bin/sh
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
xsetroot -solid grey
vncconfig -iconic &
export VGL_LOGO=1
xfce4-session &

PS.: /usr/bin/x0vncserver -rfbauth /home/user/.vnc/passwd # in my case is started with XFCE

Last edited by jakubu; 11-06-2018 at 05:58 AM.
 
1 members found this post helpful.
Old 11-06-2018, 05:43 PM   #3
allend
LQ 5k Club
 
Registered: Oct 2003
Location: Melbourne
Distribution: Slackware64-15.0
Posts: 6,357

Rep: Reputation: 2739Reputation: 2739Reputation: 2739Reputation: 2739Reputation: 2739Reputation: 2739Reputation: 2739Reputation: 2739Reputation: 2739Reputation: 2739Reputation: 2739
Quote:
At the moment a workaround is to remotely run xinit as a root:
$ sudo su -
# nohup xinit &
# exit
Since a user would get the error. "/usr/libexec/Xorg.wrap: Only console users are allowed to run the X server"
Perhaps that could be avoided by adding a file /etc/X11/Xwrapper.config containing:
Code:
allowed_users = anybody
See 'man Xwrapper.config' for details.
 
2 members found this post helpful.
  


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