https://bugs.freedesktop.org/show_bug.cgi?id=31499
--- Comment #2 from Tom Stellard tstellar@gmail.com 2010-11-18 23:45:16 PST --- It looks like some of the KDE devs have identified the failing shader as the Lanczos filter. It would be helpful if you could attach the Lanczos filter GLSL code along with the stderr output from running KWin with RADEON_DEBUG=fp