Quote Originally Posted by tball View Post
Now I have installed ubuntu-desktop also, and the 2d performance is a world to difference.

The 2d performance in gnome is much much more fluid, than it is in kde.

Does anyone have a clue why that can be? The 2d performance without compositing is also better in gnome, than it is in kde.
Apart from Kwin disabling compositing, absolutely no problem with maverick KDE using the as-delivered open source drivers here. One solution is to use compiz for KDE rather than Kwin.

Apparently the Kwin developer does not do extensive hardware checking, and the driver he was using for his R700 ATI card on his distribution didn't work, so he has disabled Kwin compositing for everyone using the open source R600c driver.

Another work-around for Kubuntu maverick:

Code:
Workaround - not a fix
Using the force - don't worry, be happy settings

Editing the ~/kde/share/config/kwinrc.

Before:
Code:

...
DisableChecks=false
...
OpenGLIsUnsafe=true


After:
Code:

...
DisableChecks=true
...
OpenGLIsUnsafe=false
...


Konsole:
Code:

LIBGL_ALWAYS_INDIRECT=1 kwin --replace


The desktop effects are working...