Well, unfortunately, I can confirm that the patch proposed does not solve the problem with my video card either (Radeon 9200). I have tested it both by patching the kde 4.7.1 version of kwin and (when that failed to appear as solved) by installing the unstable future 4.8 version (using Kubuntu Project Neon).
Well, unfortunately, I can confirm that the patch proposed does not solve the problem with my video card either (Radeon 9200). I have tested it both by patching the kde 4.7.1 version of kwin and (when that failed to appear as solved) by installing the unstable future 4.8 version (using Kubuntu Project Neon).