linux-kernel - Re: i915 suspend crash: BUG: unable to handle kernel NULL pointer deferrence

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Date:	Fri, 12 Aug 2011 08:57:41 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	Keith Packard <keithp@...thp.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	airlied@...ux.ie
Subject: Re: i915 suspend crash: BUG: unable to handle kernel NULL pointer
 deferrence

On 08/12/2011 07:14 AM, Keith Packard wrote:
> On Thu, 11 Aug 2011 23:16:23 -0700, "Justin P. Mattock"<justinmattock@...il.com>  wrote:
>
>> I can try for a bisect, but might not be able to do so due to time
>> constraints and things.
>> (if there is any patches to try and test let me know!)
>
> Can you provide the output of 'lspci -n -v', and can you tell us which
> version of the kernel this corresponds to?
>

yeah appologize for not posting any info on the machine(bit tired).
Anyways here is part of lspci(I can fpast the whole thing if need be),
and dmesg of the machine running the latest Mainline.

http://fpaste.org/aSQP/

one thing I am seeing is:


[ 96.384971] [drm:i915_get_vblank_timestamp] *ERROR* Invalid crtc 0
[ 96.408364] [drm:i915_get_vblank_timestamp] *ERROR* Invalid crtc 0
[ 96.425860] [drm:i915_get_vblank_timestamp] *ERROR* Invalid crtc 0
[ 96.443365] [drm:i915_get_vblank_timestamp] *ERROR* Invalid crtc 0
[ 96.474238] [drm:i915_get_vblank_timestamp] *ERROR* Invalid crtc 0
[ 96.491728] [drm:i915_get_vblank_timestamp] *ERROR* Invalid crtc 0
[ 96.521229] [drm:i915_get_vblank_timestamp] *ERROR* Invalid crtc 0

in of which I have not seen in the past.

as for good kernel 2.6.39-rc5 survives suspend.

Justin P. Mattock
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