help me !! kubuntu AMD64 blender crash

I have got this problem on my computer :
http://www.linuxquestions.org/questions/showthread.php?t=508897t

Blender shut down X11server when I rotate viewport’s camera anytime.


Fatal server error:
Caught signal 11. Server aborting

I have kubuntu edgy
Linux marco-laptop 2.6.17-10-generic #2 SMP Tue Dec 5 21:16:35 UTC 2006 x86_64 GNU/Linux

I tried with 2.6.18 and 2.6.19 (get on kernel.org) compiled with default config.

and under windows 64bits blender is slowest because I have ATI x200. I get DLL nvidia pilot. But don’t work(blender is again slow).