Hi Jordan,

Like I mentioned, the patch I did was specific to hardware that's a bit
different than yours, so won't fix the issue.  However, it's likely that
a similar patch may be possible that's particular to your hardware.
However, to begin with we need to collect some hardware about
particulars about your graphics card.  I've prepared a debug -ati
package that will print out the info I need.  Can you please install
this, restart X, and then collect and attach your /var/log/Xorg.0.log?
It will have lines prepended by 'BWH: ' in them, which is the info I
need.

http://bryceharrington.org/ubuntu/AtiDithering/

I've built both amd64 and i386 debs, and included -dbg packages for
each.

Once we have the data, I can craft a dithering-enablement patch, however
my experience with the other dithering patch was that it took a lot of
bit fiddling to get the right settings.  Do you know how to build .deb
packages yourself?  If so, I could point you to the flags and how to
tweak them, so you can tinker with them directly.  If not, I can make
some guesses and we can iterate.

** Changed in: xserver-xorg-video-ati (Ubuntu)
     Assignee: (unassigned) => Bryce Harrington (bryceharrington)
       Status: Triaged => In Progress

-- 
Dithering not enabled causing gradient banding on Macbook Pro, until 
suspend/resume [M56P Mobility X1600]
https://bugs.launchpad.net/bugs/264535
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