SRU request LP#302421

[Andy Whitcroft]

On Wed, Nov 26, 2008 at 02:19:21PM +0000, Colin Ian King wrote:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/302421
> 
> Hardy SRU justification:
> 
> Impact: i915 video driver: screen goes white, red, green or blue during
> suspend/resume or hibernation
> 
> Fix: Backport upstream commits 39273b58a409cd6d65c9732bdca00bacd1626672
> and a59e122a67b88925944d3bbf33d152
> 
> These commits fix flips the ARX register into index mode before
> restoring the AR registers fix an off-by one save/restore index bug for
> the AR and CR registers.
> 
> Testcase: Without the attached patch, the screen occasionally goes
> completely white, red, green or blue during suspend/resume and
> hibernate.  With patch the problem does not occur.

These look sensible.  The attached patch looks like a faithful backport
of the upstream commits.

-apw