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

[cpollock@embarqmail.com (Chris)]

On Mon, 2014-12-15 at 08:58 -0800, Greg KH wrote:
> On Mon, Dec 15, 2014 at 08:02:13AM -0600, Chris wrote:
> > I'm hoping I can get some advice/help here on this list with the above
> > problem that is causing system lockups. I didn't want to post to the
> > main list as I'm not sure it would be appropriate, I'm not even sure
> > it's appropriate here but I'll give it a try. If someone has a better
> > list to post to please let me know.
> > 
> > I have noticed the lockups periodically since 09/13/2014. I can't
> > remember what kernel version was in use then possibly kernel
> > 3.13.0-35-generic or -36. It has continued periodically through versions
> > -39; -40 and now to -43. The last time this has happened was Dec 13
> > 14:40:57 localhost kernel: [154858.820009] [drm:i915_hangcheck_
> > elapsed] *ERROR* Hangcheck timer elapsed... render ring idle. At times
> > when it locks up I will have a cursor on a black screen and will have to
> > press the power button to restart other times it will lockup whenever
> > I'm in an application. At that time I can usually CTRL>ALT-F1 log in and
> > run 'sudo reboot' to restart the system.
> > 
> > Kernel version information is:
> > 
> > Linux version 3.13.0-43-generic (buildd at tipua) (gcc version 4.8.2
> > (Ubuntu 4.8.2-19ubuntu1) ) #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014
> > (Ubuntu 3.13.0-43.72-generic 3.13.11.11)
> 
> That's a very old distro-specific kernel, try building a kernel.org
> release (like 3.18) and see if the problem is still there or not.  No
> one in the community can help with old, distro-specific kernels, except
> for the distro itself.
> 
> There are lots of Intel graphic driver changes happening in the kernel,
> I strongly recommend updating if you have an issue with your hardware.
> I got 2 _hours_ battery life extension in the 3.17 kernel alone due to
> Intel driver fixes.
> 
> good luck,
> 
> greg k-h
> 
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?

Chris

-- 
Chris
KeyID 0xE372A7DA98E6705C
31.11?N 97.89?W (Elev. 1092 ft)
11:57:50 up 2 min, 1 user, load average: 2.78, 1.92, 0.78
Ubuntu 14.04.1 LTS, kernel 3.13.0-43-generic