Gerald Turner <gtur...@unzane.com> writes:

> Gerald Turner <gtur...@unzane.com> writes:
>
>> Gerald Turner <gtur...@unzane.com> writes:
>>
>>> I downgraded to linux-image-2.6.32-5-686_2.6.32-29_i386.deb¹ and
>>> resume From hibernate works flawlessly again.
>>>
>>> Could the bug be caused by one of these changes in ..-30?
>>>
>>>   * drm/i915: Free hardware status page on unload when physically
>>>     mapped.
>>>   * drm/i915/overlay: Ensure that the reg_bo is in the GTT prior to
>>>     writing.
>>>   * drm/i915/sdvo: Always add a 30ms delay to make SDVO TV detection
>>>     reliable.
>>>
>>
>> I rebuilt -30 with these three patches disabled:
>>
>>   debian/patches/series/30:
>>   #+ 
>> bugfix/all/drm-i915-free-hardware-status-page-on-unload-when-physically-mapped.patch
>>   #+ 
>> bugfix/all/drm-i915-overlay-ensure-that-the-reg_bo-is-in-the-gtt-prior-to-writing.patch
>>   #+ 
>> bugfix/all/drm-i915-sdvo-always-add-a-30ms-delay-to-make-sdvo-tv-detection-reliable.patch
>>
>> Hibernate/resume is working.
>>
>> Will try building with fewer patches disabled to isolate which patch
>> is breaking EeePC resume.
>
> I tried another build with only one patch disabled:
>   drm-i915-free-hardware-status-page-on-unload-when-physically-mapped.patch
> …resume fails again.
>
> I suspect the bug is triggered by:
>   drm-i915-overlay-ensure-that-the-reg_bo-is-in-the-gtt-prior-to-writing.patch
>
> I'll do another build with only that patch disabled in a few hours.

Tested -30 kernel built with only having patch
drm-i915-overlay-ensure-that-the-reg_bo-is-in-the-gtt-prior-to-writing.patch
dropped and resume from hibernate works.

The patch is described as:

  Just makes sure that writes are not being aliased by the CPU cache and
  do make it out to main memory.

  Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
  Signed-off-by: Andi Kleen <a...@linux.intel.com>
  Reviewed-by: Daniel Vetter <daniel.vet...@ffwll.ch>
  Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=24977
  Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>

I followed the bugzilla link, the bug is about a green window shown
instead of video - I have no such problem on this hardware (945GM)
without the patch (tested command: mplayer 1259_X_in_squeeze.ogv -vo
xv:port=88).

BTW, looks like this my bug report may also be a duplicate of #610589
and that Sebastian Andrzej Siewior has reported a similar regression
with this patch (however EeePC immediately resets during resume).  That
makes 5 or 6 accounts of i915 hardware with broken hibernate/resume on
-30 kernel.

-- 
Gerald Turner   Email: gtur...@unzane.com   JID: gtur...@unzane.com
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