Display corruption in KDE on F11 with intel graphics

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On Thursday 25 June 2009 15:31:29 Andreas Petzold wrote:
> Hi,
>
> since I've upgraded from F10 to F11, I'm getting corrupted graphics in
> many kde apps. See
>
> http://iktp.tu-dresden.de/~petzold/corrupt.png
>
> for an example. Usually, the desktop background is displayed in
> toolbars instead of the regular toolbar background, but sometimes this
> also happens in other places. If I resize the window or mouse-over the
> affected parts of the window, the problem fixes itself, but it will
> reappear soon. I've only seen this with kde apps and not with others
> like firefox. Since F10 and F11 use the same qt version I suspect the
> intel drivel for my venerable i830 graphics chipset is at fault. Does
> anybody on this list use F11 with kde on a machine with an (old) intel
> chipset with or without the same problems that I'm seeing? I haven't
> had the time to play around with any of the different acceleration
> options of the new intel driver, I'll check that later.
>
It's odds-on that acceleration method is the key.  Intel and ATi are both 
rapidly developing their drivers to meet the more stringent requirements of 
recent distros.  Kde4 desktops in particular uses parts of the driver not 
stressed in older versions.  On this laptop I have an ATi display.  The 
desktop works best with AccelMode set to EXA, but kuickshow has corrupted 
display in EXA and looks fine with XAA.  It really does seem to be something 
where you just have to experiment.

You might find http://userbase.kde.org/GPU-Performance helpful

Anne
-- 
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