[Intel-gfx] [PATCH 1/2] drm/i915: re-enable semaphores by default

Nicolas Kalkhof nkalkhof at web.de
Thu Nov 17 09:57:09 CET 2011


your ppgtt branch commit hardlocks my machine (SNB Mobile GT2+) as soon as I fire up X with a black screen. No crashdumps/syslogs :( Kernel params are: intel_iommu=off pcie_aspm=force i915.i915_enable_rc6=1. neither i915.semaphores=1 changes that nor does dmesg yield anything fancy.


-----Urspr√ľngliche Nachricht-----
Von: "Daniel Vetter" <daniel.vetter at ffwll.ch>
Gesendet: Nov 16, 2011 10:14:18 PM
An: "Nicolas Kalkhof" <nkalkhof at web.de>
Betreff: Re: [Intel-gfx] [PATCH 1/2] drm/i915: re-enable semaphores by default

>On Wed, Nov 16, 2011 at 21:56, Nicolas Kalkhof <nkalkhof at web.de> wrote:
>> Not quite. On my i7 2620M (Lenovo T420) the gpu frequently hangs when decoding videos (vaapi) and running OpenGL apps/games at the same time. Disabling iommu makes my system relatively stable even with rc6 enabled. I haven't played with the semaphores however.
>Can you please try my ppgtt branch from my fdo repo at
>http://cgit.freedesktop.org/~danvet/drm/ ? Note thought that it'll
>only work on snb/ivb and that suspend/resume is broken. Also, it won't
>properly re-enable ppgtt when resetting the gpu after a hang.
>But testing feedback highly appreciated.
>Thanks, Daniel
>Daniel Vetter
>daniel.vetter at ffwll.ch - +41 (0) 79 365 57 48 - http://blog.ffwll.ch

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