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

[Marcel Telka]

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.

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| Marcel Telka   e-mail:   marcel at telka.sk  |
|                homepage: http://telka.sk/ |
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