kernel: [154858.820009] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed.

[Valdis.Kletnieks at vt.edu]

On Mon, 15 Dec 2014 10:01:54 -0800, Greg KH said:
> On Mon, Dec 15, 2014 at 11:59:27AM -0600, Chris wrote:

> > That's what I thought Greg but wanted to make sure. AFAIK I'm not having
> > any hardware related issues but I would like to know what the 'Hangcheck
> > timer' is. Possibly you can enlighten me?
>
> That looks like a driver-specific timer, the code would tell you more,
> take a look at it!

I'm pretty sure that's a timer for the i915 driver that detects if the
GPU has gone into an infinite loop due to (usually) buggy programming from
the operating system....
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