[Bug 17129] Slow to move translucent windows above a certain size with EXA (r300)

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=17129





--- Comment #6 from Joel Feiner <jafeiner at gmail.com>  2008-08-14 09:52:18 PST ---
(In reply to comment #5)
> I tracked down the KDE4 slowdown to the shadows ending up using pictures with
> non-power-of-two dimensions, which at least pre-R500 hardware doesn't support
> as a repeated source. You can avoid this by making sure the kwin shadow plugin
> size and offset (or something like that) parameters add up to a power of two.
> 
> Now, I don't think xcompmgr uses the same technique for shadows, and I can't
> seem to reproduce the problem with it even with shadows enabled. But FWIW, does
> not enabling shadows avoid the problem for you?
> 

The only way I know to disable shadows is to set the radius to 0 (e.g.,
xcompmgr -c -R 0).  I get the same results there, although it's slightly less
laggy.  Also setting FBTexPercent to 0 seems to improve things in general, but
the problem remains.


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