Video Freeze

Thu Jun 30 00:36:48 UTC 2016

On Tue, Jun 28, 2016 at 9:05 AM, Chris <cpollock at embarqmail.com> wrote:

> On Mon, 2016-06-27 at 13:02 -0500, Tommy Trussell wrote:
> >
> > On Sun, Jun 26, 2016 at 3:24 PM, Chris <cpollock at embarqmail.com>
> > wrote:
> >         I experienced a video freeze this afternoon running 14.04.4
> >         LTS with the
> >         kernel shown in my sig. Some trace information was inserted
> >         into my
> >         syslog which I've put up on Pastebin and can be downloaded
> >         here -
> >         https://pastebin.com/d2Kp7vQ3 can anyone tell me what this
> >         might mean
> >         and is it related to a video freeze in which the clock is
> >         frozen, the
> >         mouse cursor will move but I can't switch between desktops
> >         however all
> >         background processes, fetchmail, procmail, Spamassassin and
> >         others
> >         continue to run.
> >
> >         Thanks
> >         Chris
> >
> >         --
> >         Chris
> >         KeyID 0xE372A7DA98E6705C
> >         31.11°N 97.89°W (Elev. 1092 ft)
> >         15:19:18 up 2:12, 1 user, load average: 0.81, 0.64, 0.56
> >         Ubuntu 14.04.4 LTS, kernel 4.4.0-24-generic #43~14.04.1-Ubuntu
> >         SMP Thu
> >         Jun 9 09:46:12 UTC 2016
> >
> >
> >
> > I have had similar freezes in the past few weeks, but only after I
> > installed the HWE kernel / "LTS Enablement
> > Stack" https://wiki.ubuntu.com/Kernel/LTSEnablementStack -- which on
> > my system installed the 4.2.0-38 generic kernel -- SO I presume some
> > sort of strangeness with the kernel and video driver or something, and
> > it might be very difficult to blame the bug on the kernel, the video
> > driver, or the application that froze the display.
> >
> I've had video freeze issues since Sept of 2014 shortly after I
> installed 14.04 lts. This is what my syslog would show:
>
> [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render
> ring idle
>
> As time progressed and the kernel versions I ran the hangcheck error
> would still show up, even into this year. However, there are times when
> there was a freeze but the hangcheck error would not be noted. I've even
> gone as high as kernel 4.7* and would get a video freeze. Following
> advice from a person on the Intel-Gfx list I removed the
> xserver-xorg-video-intel driver and switched to the 'modeset driver'.
> I've attached my Xorg.0.log file
>
>
How about using vesa?  I had a laptop before that does very weird and using
vesa driver seems made it stable.

> In fact I just had another freeze about 45min ago and had to SSH in with
> my tablet and reboot from there.
>
> >
> > Note that after doing this, I am no longer running a "pure" 14.04 LTS
> > "Trusty" setup, AND neither are you -- in fact your kernel is newer
> > than mine -- it's a Xenial kernel.
> >
> >
> > In my case the freezes have occurred only when running Chromium with a
> > YouTube video set at full screen. The first thing you might want to
> > check (if you're using Google Chrome or Chromium) is to go into the
> > Advanced settings and make sure "Use hardware acceleration when
> > available" is turned OFF.
> >
> I run FireFox V47.0 and did have HW acceleration on so I've since set it
> to off.
>
> >
> > Now my system freezes only when the video is full screen, fairly long
> > (like an hour) and only after I have been watching it for more than a
> > few minutes. I figure the decreased circumstances are an improvement,
> > but not worth complaining about since I'm no longer running a "pure"
> > LTS system.
> >
> I guess you could say my system hasn't been pure for a long time.
> Depending on who you
> talk to whether it's someone who works on kernel bugs or someone on the
> Intel-Gfx list depends
> on what kernel I'm advised to run.
>
> > Since you're running the Xenial kernel anyway, maybe it's time to
> > consider doing a full upgrade to Ubuntu 16.04 "Xenial" and seeing if
> > the freezes improve. If it doesn't improve, you may be able to better
> > find a relevant bug to sign on to because when you are running a more
> > standard setup.
> >
> I plan on that but I'm waiting for 16.04.1 before doing it. I'm not even
> running the
> standard Ubuntu Gnome version. I'm running 3.12 and 14.04 comes with 3.10
>
> >
> > I would suggest looking for bugs related to the GUI applications that
> > happen to be running when your system freezes (including any screen
> > savers), and also check for reports regarding the graphics display
> > driver for your video card.
> >
> The only GUI apps that are running anytime there is a freeze are Evo,
> FireFox, GKrellM and
> sometimes Nautilus. Since you mentioned about GUI apps I just shut down
> GKrellM as a test.
> I've got no screensavers running at all though I used to run XScreensaver
> but stopped that
> long ago as a test to see if it was causing issues which apparently it
> wasn't.
>
> Chris
>
> --
> Chris
> KeyID 0xE372A7DA98E6705C
> 31.11°N 97.89°W (Elev. 1092 ft)
> 19:45:45 up 2 min, 1 user, load average: 3.81, 1.51, 0.56
> Ubuntu 14.04.4 LTS, kernel 4.4.0-28-generic #47~14.04.1-Ubuntu SMP Fri
> Jun 24 16:30:35 UTC 2016
>
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