linux-kernel - Re: WARNING: at drivers/gpu/drm/i915/intel

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Message-ID: <20150103170313.GB3020@yulia-desktop>
Date:	Sat, 3 Jan 2015 20:03:13 +0300
From:	Andrey Skvortsov <andrej.skvortzov@...il.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	intel-gfx@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Daniel Vetter <daniel.vetter@...el.com>
Subject: Re: WARNING: at drivers/gpu/drm/i915/intel_display.c:11375 [i915] in
 3.19-rc2

On Fri, Jan 02, 2015 at 08:27:29PM +0530, Sudip Mukherjee wrote:
> On Thu, Jan 01, 2015 at 05:22:15PM +0300, Andrey Skvortsov wrote:
> > Hi,
> > 
> > this warning does not exist in 3.19-rc1, but it happens every boot in
> > 3.19-rc2. If you need any other information or data, I would be glad
> > to help to debug it. 
> 
> mine is also i915, but i am not seeing any warning. if you send me your .config, then i can try booting using that.
> the current kernel version is : 3.19.0-rc2-next-20141231+
> 

Sorry, my first message was not fully correct. As I tried to bisect
this, I noticed that this warning happens unfortunately not every
boot. And I noticed another strange behavior. If the
same kernel is always booted, the warning happens very seldom. To make
it appear more frequently I booted v3.19-rc2 and
v3.19-rc1-g08b022a9655bf one after another many times. In this case it
happens with probability around 50% during the boot.

my config is attached.

-- 
Best regards,
Andrey Skvortsov

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