linux-kernel - Re: [REGRESSION] Kernel 3.5 to 3.7-rc4 / GMA500 / DPMS sometimes crashes system

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Message-ID: <20121108192221.48907c04@pyramind.ukuu.org.uk>
Date:	Thu, 8 Nov 2012 19:22:21 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"Chini, Georg (HP App Services)" <georg.chini@...com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [REGRESSION] Kernel 3.5 to 3.7-rc4 / GMA500 / DPMS sometimes
 crashes system

> generally it takes 3 or 4 cycles to trigger the bug. Kernel 3.4.3 works fine.
> There are no messages in the logs. Any idea what might cause this or how I
> can debug it any further? I will supply more details on my setup if needed.
> Please CC me in your reply as I am not subscribed to the list.

If 3.4.3 works and 3.5 fails then that is a big help as it narrows the
possible range of causes down quite a bit.

Hardware info would be helpful here but I suspect it may be a case of
doing a set of test builds to identify the offending patch.

Also anything in the log might be helpful including doing the runs with
drm.debug=255 in the kernel command line to get full traces

Alan
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