https://bugs.freedesktop.org/show_bug.cgi?id=31465

Alex Deucher agd5f@yahoo.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Product|xorg |Mesa Version|7.5 |unspecified Component|Driver/Radeon |Drivers/DRI/r300 AssignedTo|xorg-driver-ati@lists.x.org |dri-devel@lists.freedesktop | |.org QAContact|xorg-team@lists.x.org |

--- Comment #4 from Alex Deucher agd5f@yahoo.com 2010-11-09 09:06:37 PST --- (In reply to comment #3)

(In reply to comment #2)

...

Are you using GL or render for composite?

GL

In that case, this is an issue with the 3D driver. kde is apparently hitting some slow path. What version of mesa are you using? You might try mesa 7.9 or the r300 gallium driver if you are using the r300 classic driver.