[Intel-gfx] Video freezes continue to plague me

[Felix Miata]

Chris composed on 2016-03-15 17:43 (UTC-0500):

> On Tue, 2016-03-15 at 16:37 -0400, Felix Miata wrote:

>> Chris composed on 2016-03-15 14:50 (UTC-0500):

>> > My system is a Dell Optiplex 780.

>> Which? Tower? Desktop? SFF? USFF?

> Sorry, it's a desktop

>> > I've filed several bug reports both
>> > with the Intel Graphics Bugzilla and the Ubuntu Launchpad pages.
>> > Initially back when this started in 2014 every 'freeze' would result in
>> > an error of [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer
>> > elapsed... render ring idle' in syslog. It would happen every few days
>> > or so and nothing that was done would correct the problem....

>> Was ensuring heat is a non-issue also done? SFF & USFF models tend to run
>> rather hot, so accumulated dust, and especially tobacco tar, within,
>> especially within the power supply, can become an intermittent problem for
>> software.

> Currently it's 87F outside. I have a window open directly behind the
> system and a fan blowing on the front of it. We're just not ready to
> turn the AC on yet. CPU0 is running around 116F and CPU1 109F. This
> whole issue of the video freezing whether it's with or without the
> Hangcheck error has been ongoing here on my system since 13 Sept 2014.
> The last time the video froze with the Hangcheck error was Jan 17 2016.
> Since then the video has frozen without the error on 1/21/16; 1/27/16;
> 2/25/16; 3/08/16; 3/11/16; and today 3/15/16 at 09:50am. I came back to
> the desktop at around 11am to find it frozen at 9:50. I moved the mouse,
> the video flickered and the clock caught up and came unfrozen. The only
> thing in my syslog for that time is:

> 09:50:07 localhost kernel: [347769.284331] [drm:drm_mode_addfb2] [FB:60]
> 09:50:07 localhost kernel: [347769.303256] [drm:drm_mode_addfb2] [FB:62]
> 09:50:07 localhost kernel: [347769.324369] [drm:drm_mode_addfb2] [FB:63]

Ambient temps tolerated by humans really shouldn't matter. Excess heat inside 
the case is often a problem elsewhere than where temp probes lie when dust 
has materially accumulated. What I was really asking is, is its inside 
reasonably clean, including inside the PSU? In 2014 it would have been around 
5 or 6 years old. Also, is the PSU fan always moving some air?

Maybe it's time to give it an overnight memtest workout. Could be there's 
become an iffy bit in the video RAM area.

I have a 780 too, and a 760, and a 745, and several 620s, but they are all 
SFF, and don't often get left on more than a couple of hours at a time. Video 
lockups I don't remember ever seeing on any of them. Gnome isn't installed on 
any. Kubuntu on one 620 might be 14.10, but only openSUSE 13.1, 13.2, 42.1 
and Tumbleweed are on my 780. 13.2 uses kernel 3.16.7, 42.1 4.1.15, and TW 
(currently) 4.4.3.
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

  Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/