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Undentified issue with primus or bumblebee.




I use Debian "Buster" on a laptop Lenovo G580 (Geforce 635M). 
I updated the primus package 2015XXYY-6 but i didn't solved anything:

When i launch flightgear with (antialiasing 2x, nothing else):
optirun -b primus fgfs --prop:/sim/rendering/multi-sample-buffers=true --prop:/sim/rendering/multi-samples=2 --log-level=debug

i get:
........
Using stock OSG implementation of GraphicsWindow
StatsHandler::StatsHandler() Setting up GL2 compatible shaders
initializing cloud layers
Using initial window size: 1024 x 768
Error: Not able to create requested visual.

getDefaultWindow: failed to create GraphicsContext
Error: Not able to create requested visual.

getDefaultWindow: failed to create GraphicsContext
CameraGroup::buildGUICamera: failed to build a window
Enabling ATI/AMD viewport hack
.........

Now with urban terror:
primusrun /UrbanTerror43/Quake3-UrT.x86_64

I get:
........
----- Client Initialization Complete -----
----- R_Init -----
...loading libGL.so.1:
Calling SDL_Init(SDL_INIT_VIDEO)...
SDL_Init(SDL_INIT_VIDEO) passed.
Initializing OpenGL display
...setting mode 13: 1366 768
Received signal 11, exiting...
----- CL_Shutdown -----
RE_Shutdown( 1 )
Errore di segmentazione
...........


Last test with vlc, "primusrun vlc" gets:

/usr/bin/primusrun: riga 41: attenzione: command substitution: ignored null byte in input
VLC media player 3.0.0-rc6 Vetinari (revision 3.0.0-rc6-0-g1d05ae3858)
[0000560f57e65a30] main libvlc: Esecuzione di vlc con l'interfaccia predefinita. Usa 'cvlc' per utilizzare vlc senza interfaccia.
../include/vlc_xlib.h:46:vlc_xlib_init: Xlib not initialized for threads.
This process is probably using LibVLC incorrectly.
Pass "--no-xlib" to libvlc_new() to fix this.
[0000560f57f4e240] qt interface error: Xlib not initialized for threads                                           
../include/vlc_xlib.h:46:vlc_xlib_init: Xlib not initialized for threads.
This process is probably using LibVLC incorrectly.
Pass "--no-xlib" to libvlc_new() to fix this.
[0000560f57f4e240] skins2 interface error: Xlib not initialized for threads                                       
[0000560f57f4e240] skins2 interface error: initializing xlib for multi-threading failed                           
[0000560f57f4e240] skins2 interface error: cannot initialize OSFactory                                            
[0000560f57e64350] main playlist: playlist is empty
[0000560f57f4e240] [cli] lua interface: Listening on host "*console".
VLC media player 3.0.0-rc6 Vetinari
Command Line Interface initialized.


Any suggestions? thanks

Regards
Attilio