Comment 12 for bug 728923

From my dup Bug #774909 since 2011-05-02 no GPU stall until now, obviously very random in occurance and behaviour.
Was writing some text, out of a sudden screen went black, no mouse, no keyboard function, rebooted with power button.
Fragment in kern.log:
kernel: [136934.865866] BUG: unable to handle kernel paging request at ffffc900118a76f8