i915 pipe A assertion failure (expected on, current off)

[Daniel Vetter]

On Sat, Sep 21, 2013 at 5:29 PM, Meelis Roos <mroos at linux.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 at ffwll.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