merci pour la rapidité de la réponse.
dans le terminal, ça donne çeci :
-----------------------------------------
| ## ### ### # # ### ### # # # # #|
| # # ## # # ### ## # # # ###|
|## # ### ### ### # # # # # ### # #|
| Stellarium 0.7.1|
-----------------------------------------
Copyright (C) 2000-2005 Fabien Chereau et al.
Please check last version and send bug report & comments
on stellarium web page :
http://www.stellarium.org
Loading configuration file /root/.stellarium/config.ini ...
X Error of failed request: BadValue (integer parameter out of range for operation)
Major opcode of failed request: 134 (XFree86-VidModeExtension)
Minor opcode of failed request: 10 (XF86VidModeSwitchToMode)
Value in failed request: 0x64
Serial number of failed request: 107
Current serial number in output stream: 109
