Created attachment 61855 [details] Whole X log containing error message. X crashed. Backtrace: [ 31096.956] 0: /usr/bin/X11/X (xorg_backtrace+0x26) [0x7f3bcdaba4d6] [ 31096.956] 1: /usr/bin/X11/X (0x7f3bcd936000+0x188119) [0x7f3bcdabe119] [ 31096.956] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f3bccc5e000+0xf030) [0x7f3bccc6d030] [ 31096.956] 3: /usr/bin/X11/X (0x7f3bcd936000+0x181685) [0x7f3bcdab7685] [ 31096.956] 4: /usr/bin/X11/X (WaitForSomething+0x4fb) [0x7f3bcdab7c1b] [ 31096.956] 5: /usr/bin/X11/X (0x7f3bcd936000+0x51cd2) [0x7f3bcd987cd2] [ 31096.956] 6: /usr/bin/X11/X (0x7f3bcd936000+0x411aa) [0x7f3bcd9771aa] [ 31096.956] 7: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xfd) [0x7f3bcb987ead] [ 31096.956] 8: /usr/bin/X11/X (0x7f3bcd936000+0x4149d) [0x7f3bcd97749d] [ 31096.956] Segmentation fault at address (nil) [ 31096.956] Fatal server error: [ 31096.956] Caught signal 11 (Segmentation fault). Server aborting [ 31096.956] [ 31096.961]
Your backtrace doesn't give much information, and you're using the closed source ATI drivers. Please see http://www.x.org/wiki/Development/Documentation/ServerDebugging
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