Problems with the radeon driver

[Marat N.Afanasyev]

Adam K Kirchhoff wrote:
>
> Has anyone else seen this type of artefacting with the radeon driver:
>
> http://adam.visualtech.com/radeon-corruption.jpg
>
> I get it on two different machines, one with an HD4850 and one with an HD4350.
> I've put up with it for over a year now, but it's really started to get on my
> nerves.
>
> I've done some testing and it seems to have been introduced in 6.13.0.  If I
> go back to 6.12.7, everything is fine.  I'm using X server 1.7.7 from ports,
> with EXA acceleration.  This happens without a compositor running
> (kwin/compiz/xcompmgr).  In the screenshot, it's just plain openbox.  You can
> see three windows (Terminal, akregator, chrome) as one big giant mess.   This
> happens mostly when moving/resizing windows, but also with scrolling.
>
> Running 'xrefresh' will clear the screen and redraw everything properly.  But
> then I move a window, and it happens again.  Sometimes it's worse than others.
> In the screenshot, it's particularly bad.
>
> Unfortunately, the developers in #radeon on Freenode don't seem paritcularly
> concerned as this bug is only present when using UMS (I had the same issue in
> Slackware at one point when I was using UMS), and UMS is now, essentially,
> deprecated.
>
> There is at least one bug reported on http://bugs.freedesktop.org/ that seems
> to be related: https://bugs.freedesktop.org/show_bug.cgi?id=27650
>
> Adam
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>
they say that more probably is a xorg-server bug, see
https://bugs.freedesktop.org/show_bug.cgi?id=25497
-- 
SY, Marat