[oi-dev] Fwd: [Graphics/DRM - Bug #7716] drm hang with ring dumps in messages

[Gordon Ross]

Can you confirm which model GPU on which you observed this?
(which generation, at least, and the PCI ID if convenient)

Thanks,
Gordon

On Wed, Feb 15, 2017 at 6:10 AM, Marcel Telka <marcel at telka.sk> wrote:
> On Fri, Feb 10, 2017 at 09:14:08PM +0100, Aurélien Larcher wrote:
>> On Fri, Feb 10, 2017 at 9:06 PM, Marcel Telka <marcel at telka.sk> wrote:
>>
>> > I just did on my T520:
>> >
>> > mdb -kwe 'i915_try_reset/W 1'
>> >
>> > I'll report back in few days if it won't hang (or sooner, if it will).
>
> With the i915_try_reset workaround the machine works far better.  It didn't
> hung in almost 5 days.
>
>> >
>>
>> You can trigger it by running glx_gears in non-synced mode: vblank_mode=0
>> glxgears
>>
>> See if the GPU hangs 2-3 seconds then continues.
>
> Yes, it does exactly this (with the workaround).  Without the workaround it
> just hangs forever.
>
>
> Thanks.
>
> --
> +-------------------------------------------+
> | Marcel Telka   e-mail:   marcel at telka.sk  |
> |                homepage: http://telka.sk/ |
> |                jabber:   marcel at jabber.sk |
> +-------------------------------------------+
>
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