[Bug 75394] System hangs randomly with error message: [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render ring idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75394

--- Comment #91 from Chris <cpollock at embarqmail.com> ---
Video froze last night, 01/17/2016 21:06:30 after uptime of 14d 12h 40m from
the last video freeze. I was running kernel 3.19.0-42-generic
#48~14.04.1-Ubuntu SMP Fri Dec 18 10:24:49 UTC 2015 x86_64 x86_64 x86_64
GNU/Linux) at the time. This time the hangcheck error was noted in my syslog 

Jan 17 21:17:32 localhost kernel: [1255120.808035] [drm:i915_hangcheck_elapsed
[i915]] *ERROR* Hangcheck timer elapsed... render ring idle

I did a reboot via SSH from my tablet and loaded the newest 3.19 kernel

3.19.0-43-generic #49~14.04.1-Ubuntu SMP Thu Dec 31 15:44:49 UTC 2015 x86_64
x86_64 x86_64 GNU/Linux

As usual during these freezes the mouse cursor would move but all other actions
are frozen. Could not switch to another desktop and so forth.

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