[Intel-gfx] Approximately every other day video will freeze for no reason at all and no specific time between freezes.

Chris cpollock at embarqmail.com
Sat Oct 3 13:35:36 PDT 2015

On Sat, 2015-10-03 at 18:54 +0000, Mike Lothian wrote:
> Hi
> Firstly you should open a bug on bugzilla and provide all relevant
> information there like a copy of your dmesg and Xorg.0.log output of
> lspci -nn
> You should also state what versions of various packages you're using
> if you're and what you've tried changing
> Also try the latest rc kernel to see if that fixes your issue
> Are you using any kernel overrides like fbc, rc7 or forcing atomic? If
> so switch them off - if you don't know what they are then don't worry
> Cheers
> Mike
Mike, thanks for the reply. I reported this in bug
https://bugs.freedesktop.org/show_bug.cgi?id=91495 with the stipulation
that sometimes the error [drm:i915_hangcheck_elapsed [i915]] *ERROR*
Hangcheck timer elapsed... render ring idle would show in my syslog.
That seems to not be the case anymore as it hasn't shown up since 28
July 2015. I've also reported the latest issue to Ubuntu Launchpad
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1497627 which
states simply Periodically video will freeze for no reason at all and no
specific time between freezes. Christopher M. Penalver who I assume is a
member of the Ubuntu kernel bug team has had me try several things as
noted in my Ubuntu bug report above. The latest was today when he had me
install and attempt to boot into the latest upstream kernels at
http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D which I did this
morning. Of those listed starting at the top of the list this is what
happened when trying to boot into them

v4.3-rc3-unstable - Boot process would begin but would not complete
v4.3-rc2-unstable - Same as above
v4.3-rc1-unstable - Same as above
v4.2.3-unstable - Boot process completed however I noticed when
switching desktop windows a flickering of the video

The video flickering is slight most times but it's there. I'm currently
running kernel

I'm currently running kernel

Linux localhost 4.2.3-040203-generic #201510030832 SMP Sat Oct 3
12:34:31 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

> On Fri, 2 Oct 2015 10:26 pm Chris <cpollock at embarqmail.com> wrote:
>         To elaborate on this. The video is frozen to include the clock
>         however I
>         can move the mouse cursor around the screen. I can not however
>         switch
>         between window desktops. This happened on 28 Sept 2015 after
>         an uptime
>         of 6d20h6m, on 30 Sept after an uptime of 1d23h10m and today
>         after an
>         uptime of 1d20h12m. I have reported this bug at the Ubuntu
>         Launchpad
>         site and per an individual there I was instructed to go from
>         running
>         kernel 4.0.0-997-generic #201503310205 SMP Tue Mar
>         31 02:07:04 UTC 2015 (I could not report this bug because
>         apport-collect
>         would error with 'non supported kernel') so he had me switch
>         to kernel
>         3.19.0-30-generic #33~14.04.1-Ubuntu SMP Tue Sep 22 09:27:00
>         UTC 2015.
>         System info is Ubuntu 14.04.3 LTS Gnome-Shell 3.12.2. Computer
>         is a Dell
>         Optiplex 780 with Bios A15. There are no errors shown in my
>         syslog as in
>         previous problems where "Hangcheck...render ring idle" would
>         show up.
>         All background processes such as Fetchmail, Procmail, Spam
>         Assassin,
>         ClamAv and cron jobs continue to run normally.
>         Any assistance would be appreciated.
>         Chris

KeyID 0xE372A7DA98E6705C
31.11°N 97.89°W (Elev. 1092 ft)
15:23:11 up 6:17, 1 user, load average: 0.67, 0.42, 0.25
Ubuntu 14.04.3 LTS, kernel 4.2.3-040203-generic #201510030832 SMP Sat
Oct 3 12:34:31 UTC 2015

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