Re: Video freezes continue to plague me

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On Tue, 2016-03-15 at 19:17 -0400, Felix Miata wrote:
> 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.

Thanks Felix, I'll see if giving it a good will make any difference.

-- 
Chris
KeyID 0xE372A7DA98E6705C
31.11°N 97.89°W (Elev. 1092 ft)
19:28:00 up 7:40, 1 user, load average: 0.75, 0.52, 0.44
Ubuntu 14.04.4 LTS, kernel 3.19.0-56-generic #62~14.04.1-Ubuntu SMP Fri
Mar 11 11:03:15 UTC 2016

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