Hi Daniel,
A bug was opened against the Ubuntu kernel[0]. It was found that reverting the following commit resolved this bug:
commit 657445fe8660100ad174600ebfa61536392b7624
Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date: Sat May 4 10:09:18 2013 +0200
Revert "drm/i915: revert eDP bpp clamping code changes"
The regression was introduced as of v3.10-rc2 and affects a large number of end users.
I see this code has gone back and forth a few times, so I was wondering if we could get some feedback. The revert of commit 657445f was tested aginst 3.11 stable and could not be done cleanly, so I had to make some modifications. The modifications I made for 3.11 are in [PATCH 1/1]. The revert can't be done cleanly against 3.12 neither. The modifications I made for 3.11 will not work cleanly on 3.12 due to recent changes in 3.12, such as commit 7984211. However, I can create a patch specific for 3.12 if you think this is the best way to go.
Thanks,
Joe
http://pad.lv/1195483
Joseph Salisbury (1):
Revert "Revert "drm/i915: revert eDP bpp clamping code changes""
drivers/gpu/drm/i915/intel_dp.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
--
1.7.9.5
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