Comment 2 for bug 138447

Kow (kow) wrote :

Same problem here, backtrace from xorg log stops at nvidia_drv.so. Does not occur if compiz is disabled. This fix is either going to be a workaround or a wait-on-nvidia deal. I still recommend compiz being disabled automatically when a user installs the nvidia driver in gutsy. (but give them the option to turn it back on).

Here is the backtrace even though it doesnt give any info at all besides what is already known:
Backtrace:
0: /usr/bin/X(xf86SigHandler+0x6d) [0x4866cd]
1: /lib/libc.so.6 [0x2afb52a297d0]
2: /lib/libc.so.6(cfree+0x3b) [0x2afb52a6d6ab]
3: /usr/lib/xorg/modules/drivers//nvidia_drv.so(_nv002411X+0x1f6) [0x2afb552e2e86]

Fatal server error:
Caught signal 11. Server aborting