https://bugs.freedesktop.org/show_bug.cgi?id=86357
--- Comment #3 from madcatx@atlas.cz --- I haven't tried any of the fixes suggested there yet. I did however updated to 3.17.3 and the box survived yesteday without crashing. Is there anything in 3.17.3 that could have fixed or at least partially mitigagted the problem? Should I stick with 3.17.2 until you have save more definitive clue as to what is causing this?
It usually takes a few hours for the crash to happen so I might just have been lucky though. I'll keep an eye on this report my findings in the "BUG 85647" thread.
Thanks...