Re: Intel i915 GPU hung

Waking up an old thread here but I thought I'd share what I've learned.

I think I found out what caused both tearing and crashing when I used
OpenGL.
Since I changed from using xcompmgr to compton with following options

compton --backend glx --vsync opengl-swc --paint-on-overlay
--glx-no-stencil -b

I have never had a crash or tearing. Have no idea why this is but I am just
happy I don't get hung GPU anymore.


--
Johannes Lundberg
BRILLIANTSERVICE CO., LTD.

On Fri, Sep 12, 2014 at 2:07 PM, Lundberg, Johannes <
johannes_at_brilliantservice.co.jp> wrote:

> Now with only "sna" enabled (which I think I read somewhere should be the
> default and that's why I didn't enable it before) I got GPU hung again.
>
> uname -a:
> FreeBSD bsd 10.0-RELEASE FreeBSD 10.0-RELEASE #0 r260789: Thu Jan 16
> 22:34:59 UTC 2014     root_at_snap.freebsd.org:/usr/
> obj/usr/src/sys/GENERIC  amd64
>
> dmesg, error_state, pciconf, pkginfo and Xorg.0.log can be downloaded here
>
> https://dl.dropboxusercontent.com/u/10335306/GPU_hung_logs.zip
>
>
>
> --
> Johannes Lundberg
> BRILLIANTSERVICE CO., LTD.
>
> On Fri, Sep 12, 2014 at 10:14 AM, Garrett Cooper <yaneurabeya_at_gmail.com>
> wrote:
>
>> On Thu, Sep 11, 2014 at 6:08 PM, Lundberg, Johannes
>> <johannes_at_brilliantservice.co.jp> wrote:
>> > First try with sna+swapbufferswait+tearfree gave me this after a while
>> >
>> > Xorg.log
>> >
>> > [  1901.000] (EE) intel(0): sna_mode_redisplay: page flipping failed,
>> > disabling CRTC:3 (pipe=0)
>> > [  1901.365] (EE) intel(0): sna_mode_redisplay: page flipping failed,
>> > disabling CRTC:5 (pipe=1)
>> > [  1901.441] (EE) intel(0): Detected a hung GPU, disabling acceleration.
>> > [  2841.578] (II) UnloadModule: "mouse"
>> > [  2841.578] (II) UnloadModule: "kbd"
>> > [  2841.579] (II) intel(0): switch to mode 1366x768_at_60.0 on pipe 0
>> using
>> > LVDS1, position (0, 0), rotation normal
>> > [  2841.632] (EE) intel(0): failed to set mode: Unknown error: -22
>> > [  2841.632] (II) intel(0): switch to mode 1280x720_at_60.3 on pipe 1
>> using
>> > VGA1, position (0, 0), rotation normal
>> > [  2841.683] (EE) intel(0): failed to set mode: Unknown error: -22
>>
>>     This looks off -- it's the Linux kernel error code for EINVAL
>> (FreeBSD error codes in the kernel being positive).
>> Cheers,
>> -Garrett
>>
>
>

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