From: Chris Wilson <chris@chris-wilson.co.uk>
To: Bryan Freed <bfreed@chromium.org>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: xrandr crashes X with a "GPU hung" in the i915 driver
Date: Fri, 05 Nov 2010 19:01:50 +0000 [thread overview]
Message-ID: <5b55a1$ij1vd3@fmsmga002.fm.intel.com> (raw)
In-Reply-To: <AANLkTineMDF-K458G8jccJx_p61GN7iXAa+4X0qYUyP1@mail.gmail.com>
On Fri, 5 Nov 2010 11:51:36 -0700, Bryan Freed <bfreed@chromium.org> wrote:
> Ah. I see 9f54107f866a25cf670f81f7c52b8c108728c6a5 in git://
> anongit.freedesktop.org/xorg/driver/xf86-video-intel, but that change looks
> i830-specific. We are running i915.
>
> My i915_error_state looks like this in a few test runs this morning:
>
> localhost ~ # cd /sys/kernel/debug/dri/0/
> localhost 0 # cat i915_error_state
> Time: 1288979468 s 955942 us
> EIR: 0x00000000
> PGTBL_ER: 0x00000000
> INSTPM: 0x00000000
> IPEIR: 0x00000000
> IPEHR: 0x01800002
> INSTDONE: 0x7dffffc1
> ACTHD: 0x07357014
That's an old kernel, not a lot of information in the i915_error_state.
0x01800002 is MI_WAIT_FOR_EVENT. The issue is that we are doing a
mode switch whilst there is a pending WAIT, so by the time the GPU
executes the wait the pipe is disabled and the GPU hangs. I just this
morning committed a patch to -intel that might help here.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
prev parent reply other threads:[~2010-11-05 19:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-05 0:12 xrandr crashes X with a "GPU hung" in the i915 driver Bryan Freed
2010-11-05 9:16 ` Chris Wilson
2010-11-05 18:51 ` Bryan Freed
2010-11-05 19:01 ` Chris Wilson [this message]
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