Comment 7 for bug 862964

In my case the actual bug seems to be the failing support for my video card by the new raster qt graphics subsystem, which becomes default in kde 4.7. The upstream bug report for this is here: https://bugs.kde.org/show_bug.cgi?id=282882

See if running this command via Alt-F2 helps:

kwin --graphicssystem native --replace &

to go back to distorted window decorations, do this:

kwin --graphicssystem raster --replace &

(just do not run these in Konsole; for some reason, when you close the Konsole window afterwards, the kwin will be gone as well :)

A workaround, which makes kwin use native graphicssystem as a default, is described in the upstream bug report as well. But it is not a permanent one, you would have to reapply the fix every time kwin is updated. So, anyone willing to read it and present a permanent alternative, working on Kubuntu?