Lockups

[sktsee]

On Mon, 12 Jan 2015 20:27:22 -0600, Chris wrote:

> In regards to my previous post about booting another kernel I noticed in
> my syslog snip from 7-8pm this popped up again:
> 
> Jan 12 19:43:52 localhost kernel: [11781.820024]
> [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render
> ring idle
> 
> I have no idea what this means but it's been in my syslog each time the
> system locks up no matter what kernel version I'm running. Can someone
> enlighten me?
> 
> 
It looks like the error is with the Intel i915 graphics (drm - direct 
rendering manager) on your system. 

Here's a couple out of many bug reports about it:
https://bugs.freedesktop.org/show_bug.cgi?id=75394
https://bugs.freedesktop.org/show_bug.cgi?id=70151

Even though some people report that new kernels solve the problem, many 
others are still wrestling with the lockups. 

This link from Ubuntu forums provides a possible workaround:
http://ubuntuforums.org/showthread.php?t=2208072

Poster suggests switching to a older acceleration method (from newer "sna" 
to older "uxa".

Also, if this is an upgraded machine, you may want to verify that the 
installed versions of the xorg packages are correct.

-- 
sktsee