I did a bisect myself over the weekend and identified a different commit
as root cause:
commit b690e96cf9e6a6cde6f0393de47bdd6317ddb5de
Author: Jesse Barnes <jbar...@virtuousgeek.org>
Date: Mon Jul 19 13:53:12 2010 -0700
drm/i915: add pipe A force quirks to i915 driver
Ported over from the old UMS list. Unfortunately they're still
necessary especially on older laptop platforms.
Fixes https://bugs.freedesktop.org/show_bug.cgi?id=22126.
Tested-by: Xavier <shinin...@gmail.com>
Tested-by: Diego Escalante Urrelo <die...@gnome.org>
Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
Signed-off-by: Eric Anholt <e...@anholt.net>
Afterwards it was rather obvious as the commit even defines a specific
change for the 2730p (in drivers/gpu/drm/i915/intel_display.c):
+ /* HP Compaq 2730p needs pipe A force quirk (LP: #291555) */
+ { 0x2a42, 0x103c, 0x30eb, quirk_pipea_force },
I attached a patch that removes those two lines and successfully applied it to
the official 3.2.1 release.
The resulting kernel/i915 module is running fine with my external screen incl.
sleep/suspend (which was the reason to include the 2730p in that commit).
** Bug watch added: freedesktop.org Bugzilla #22126
https://bugs.freedesktop.org/show_bug.cgi?id=22126
** Patch added: "796030.patch"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/796030/+attachment/2688905/+files/796030.patch
** Changed in: linux (Ubuntu)
Status: Confirmed => Invalid
** Changed in: linux (Ubuntu)
Status: Invalid => Fix Released
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https://bugs.launchpad.net/bugs/796030
Title:
intel gma 4500mhd external monitor picture scrambled
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