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Bug#597358: xserver-xorg-video-radeon: Screen brightness flickers when KMS is enabled

On Mon, Oct 11, 2010 at 8:30 PM, Ben Hutchings <ben@decadent.org.uk> wrote:
> On Mon, 2010-09-27 at 11:27 -0400, Alex Deucher wrote:
>> On Mon, Sep 27, 2010 at 11:19 AM, Cyril Brulebois <kibi@debian.org> wrote:
>> > Aaron Small <aaron.small.99a@gmail.com> (26/09/2010):
>> >> I'm having trouble applying these patches - the first two were able to
>> >> apply, but the third patch seems to be applied to source quite
>> >> different than what I have. I can't figure out how to apply it even
>> >> manually. I'm using the debian linux-source-2.6.32 package, version
>> >> 2.6.32-23. Is there a better kernel source I could try to apply to?
>> >
>> > Probably linux-2.6's master?
>> Yes.
> Alex, how confident are you about these changes?  It looks like they're
> going to potentially change clock setup for all Radeon chips; is that
> right?

Yes, it will affect all radeons, but in practice it's should really
only change things on avivo hw (r5xx+) due to the limited number of
post dividers on pre-avivo hardware.  It's the same algo that was used
originally on all radeons, before I added the newer algo; the only
tweak is that we prefer higher post dividers rather than lower ones.
In practice, it seems the older one works better.  I've tested them on
a variety of monitors on all my radeon cards (r1xx-evergreen
families). Additionally these patches have fixed several bugs where
the newer algo did not work properly.


> Ben.
> --
> Ben Hutchings
> Once a job is fouled up, anything done to improve it makes it worse.

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