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Bug#703715: Kernel bug ALPS TouchPad and i915 DRM do not play nicely on Wheezy 3.2.0-4-amd64



On 07/24/13 11:12, Ben Hutchings wrote:

On Tue, 2013-07-23 at 20:13 +1000, iiNET wrote:

Hi Kernel Maintainers

I have been tracking related bugs 704987 and 703715, I have suggested a
fix that has been under test for the last week and seems to fix the
reported issue, the following is the patch from the stable tree that
reverts Debian patch,
features/all/Input-add-Synaptics-USB-device-driver.patch.


I don't know how you think these are connected...

Aargh there not, should of said:
bugfix/x86/drm-i915-GFX_MODE-Flush-TLB-Invalidate-Mode-must-be-.
patch

Thanks for following up
Darren




Testing has been editing, creating and reading various Libre Office
files without any symptoms reported, all with various touch pad
interactions, suspend, resume.


commit e24fb4d67f53530038a9711d0c1f65937490bb8c
Author: Ben Hutchings<ben@decadent.org.uk>
Date:   Tue Jun 25 04:15:27 2013 +0100

      Revert "drm/i915: GFX_MODE Flush TLB Invalidate Mode must be  '1'
for scanli

      This reverts commit 393143615d9f2f581d87387268dc11b95adc339c, which
      was commit f05bb0c7b624252a5e768287e340e8e45df96e42 upstream.

      This has been found to cause GPU hangs when backported to 3.2, though
      not in mainline.

[...]

We are actually using the DRM code from 3.4, not 3.2.  But this patch is
applied and should not be.  Thanks for finding this.

If anyone else would like to test and confirm that this fixes the hangs
they are seeing, please use the attached patch, following the
instructions at
<http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official>.

Ben.



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