linux-kernel - Re: [Bug #16388] i915 drm BUG: unable to handle kernel paging request at a5e89046

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Message-ID: <20100723103712.5b99e8ce@virtuousgeek.org>
Date:	Fri, 23 Jul 2010 10:37:12 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	"" <lists@...nduggan.org>
Subject: Re: [Bug #16388] i915 drm BUG: unable to handle kernel paging
 request at a5e89046

On Fri, 23 Jul 2010 14:15:55 +0200 (CEST)
"Rafael J. Wysocki" <rjw@...k.pl> wrote:

> This message has been generated automatically as a part of a report
> of regressions introduced between 2.6.33 and 2.6.34.
> 
> The following bug entry is on the current list of known regressions
> introduced between 2.6.33 and 2.6.34.  Please verify if it still should
> be listed and let the tracking team know (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=16388
> Subject		: i915 drm BUG: unable to handle kernel paging request at a5e89046
> Submitter	:  <lists@...nduggan.org>
> Date		: 2010-07-14 16:59 (10 days old)

Looks like some potential memory corruption?  At resume we try to get
connector info but panic due to a bad pointer, maybe in one of the
lists.  Can you gdb your drm_kms_helper module and do "list
*drm_mode_getconnector+0x295" to see what line this is?

Also, what chipset do you have?  Maybe I can reproduce it here with
your kernel config.

-- 
Jesse Barnes, Intel Open Source Technology Center
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