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Bug#605318: radeon: horizontal interference lines on screen



Mike Sumner wrote:

[...]
> each flash is only about 1-2 cms long and I guess 1px wide, and they only
> occur on certain parts of the screen on solid dark colours and appear to be
> completely random.  They vary in colour. They show up on the grey background
> of gwenview well, and on Chromiums top window frame, which I have dark blue,
> and that gets blue flashes. Strange, but I dont see any interference on my
> desktop background, which has a large area of solid black.
[...]
> I have not tried sid kernels, but I also have a testbed install
> of Mint LMDE (based on Testing), and the problem seems to be fixed in that
> with the current kernel and radeon driver

Thanks, this helps a lot.  My random guess at the moment is that this
is related to the bug described at <http://bugs.debian.org/597358>,
which was fixed upstream in v2.6.37-rc1.  There is a series of three
patches in that bug log that could be worth a try if you have the time
(see [1]).

[1] http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s4.2.2



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