Wow. I managed to crash X. I can't remember the last time that happened - if ever....
Here it is for future reference... The symptoms were that I was watching a video off a website and suddenly the screen went blank and I got the normal login screen again... This would only happen if X had died, and sure enough...
(II) Sep 16 16:58:00 NVIDIA(0): Setting mode
(II) Sep 16 16:58:00 NVIDIA(0): "CRT-0:1280x1024_60.00+0+0,CRT-1:1280x1024_60.00+1280+0"
Backtrace:
0: /usr/bin/X (xorg_backtrace+0x3b) [0x80e954b]
1: /usr/bin/X (0x8048000+0x61e2d) [0x80a9e2d]
2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb76ed410]
Segmentation fault at address 0x300
Caught signal 11 (Segmentation fault). Server aborting
Please consult the The X.Org Foundation support
at
http://wiki.x.org for help.
I am guessing that this is a symptom of X crashing, and not the cause...
Sep 16 16:58:02 rio46 kernel: [95989.143652] __ratelimit: 12 callbacks suppressed
Sep 16 16:58:02 rio46 kernel: [95989.143656] Chrome_IOThread[4749]: segfault at 0 ip b3fc8103 sp acb57800 error 4 in chrome[b3a26000+3db9000]
Probably of no interest to anyone - not even me unless it does it again