ACK: [SRU][Artful][PATCH 0/1] UBUNTU: SAUCE: Revert "drm/i915/edp: Allow alternate fixed mode for eDP if available."

[Khaled Elmously]

On 2018-06-01 11:40:01 , Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1773520
> 
> == SRU Justification ==
> The bug reporter states that after update to Kernel 4.13-43 the intel 
> graphics seem to really lag - especially noticeable in apps which are 
> using vsync, which, at least on his system, locks to 40fps unlike the 
> previous kernel.
> 
> See https://askubuntu.com/questions/1039189/today-i-got-an-update-and-graphics-are-not-working-right-on-ubuntu-16-04/1040545#1040545 for some other users with the same issue
> 
> This regression was introduced by upstream commit dc911f5bd8aa.  A
> revert of this commit fixes this bug.  Upstream has already reverted
> this commit in drm-tip tree and cc'd it to upstream stable.  However,
> the revert has not landed in mainline or stable yet, so it is being sent
> as a SAUCE patch.
> 
> The revert is also needed in Bionic. However, the Bionic revert is
> slightly differant, so it will be SRU'd separately.
> 
> == Fix ==
> UBUNTU: SAUCE: Revert "drm/i915/edp: Allow alternate fixed mode for eDP if available."
> 
> == Regression Potential ==
> Low.  This revert is to fix a current regression.
> 
> == Test Case ==
> A test kernel was built with this patch and tested by the original bug reporter.
> The bug reporter states the test kernel resolved the bug.
> 
> Joseph Salisbury (1):
>   Revert "drm/i915/edp: Allow alternate fixed mode for eDP if
>     available."
> 
>  drivers/gpu/drm/i915/intel_dp.c    | 38 +++++---------------------------------
>  drivers/gpu/drm/i915/intel_drv.h   |  2 --
>  drivers/gpu/drm/i915/intel_dsi.c   |  2 +-
>  drivers/gpu/drm/i915/intel_dvo.c   |  2 +-
>  drivers/gpu/drm/i915/intel_lvds.c  |  3 +--
>  drivers/gpu/drm/i915/intel_panel.c |  6 ------
>  6 files changed, 8 insertions(+), 45 deletions(-)
>

Acked-by: Khalid Elmously <khalid.elmously at canonical.com>