linux-kernel - Re: i915 pipe A assertion failure (expected on, current off)

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Date:	Sat, 21 Sep 2013 17:48:42 +0200
From:	Daniel Vetter <daniel.vetter@...ll.ch>
To:	Meelis Roos <mroos@...ux.ee>
Cc:	dri-devel <dri-devel@...ts.freedesktop.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Ville Syrjälä <ville.syrjala@...ux.intel.com>,
	intel-gfx <intel-gfx@...ts.freedesktop.org>
Subject: Re: i915 pipe A assertion failure (expected on, current off)

On Sat, Sep 21, 2013 at 5:29 PM, Meelis Roos <mroos@...ux.ee> wrote:
>> Tried 3.11-rc7 on Thinkpad X30 (first 3-11-rc tried on this hw). Works
>> but i915 gives strange assertion failure with WARNING stack trace. This
>> is new since 3.10.
>
> It is still there with 3.12-rc1 but now I git around to bisecting it.
> This is the commit that introduces the warning.
>
> commit 9f11a9e4e50006b615ba94722dfc33ced89664cf
> Author: Daniel Vetter <daniel.vetter@...ll.ch>
> Date:   Thu Jun 13 00:54:58 2013 +0200
>
>     drm/i915: set up PIPECONF explicitly for i9xx/vlv platforms

My apologies for not responding to your first report, fell through the
cracks somehow. Can you please boot with drm.debug=0xe, reproduce the
WARN and grab the full dmesg (please make sure everything from boot-up
is in there). That's usually enough to figure out what's going wrong
here.

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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