linux-kernel - [Bug 13751] 2.6.30 oops with acpi/button

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Message-Id: <200907091425.08119.bjorn.helgaas@hp.com>
Date:	Thu, 9 Jul 2009 14:25:07 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	"Stephen J. Gowdy" <gowdy@...n.ch>
Cc:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	bugme-daemon@...zilla.kernel.org, Matthew Garrett <mjg@...hat.com>
Subject: [Bug 13751] 2.6.30 oops with acpi/button

>  	I've not had time to go back to it but with 2.6.30 I get an oops 
> when I close the lid on my HP Compaq 6910p laptop.

I opened this bugzilla for the oops:
  http://bugzilla.kernel.org/show_bug.cgi?id=13751

Other reports that may be related:
  http://lkml.indiana.edu/hypermail/linux/kernel/0906.2/02139.html
  https://bugs.launchpad.net/ubuntu/hardy/+source/hotkey-setup/+bug/157691

I see floundering and workarounds in the reports above, but no
real solution yet.

The oops is a page fault on the IP, which means we branched into
the weeds, possibly by following a bad function pointer:

  BUG: unable to handle kernel paging request at ffff88007f223c30
  IP: [<ffff88007f223c30>] 0xffff88007f223c30

One possible cause is a module that doesn't clean up properly
when it is unloaded.  Can you reproduce the problem with
CONFIG_MODULE_UNLOAD turned off?

I doubt this is a button driver problem, but attached is a patch that
reverts the driver to the 2.6.29 version.  Can you try it out?

Bjorn

View attachment "button.patch" of type "text/x-diff" (14064 bytes)