I've tried building xserver-xorg-core without some Ubuntu/Fedora specific patches. A build of xserver-xorg-core without the '107_fedora_dont_backfill_bg_none.patch' patch doesn't seem to have any video garbage. Steps you can use to reproduce are on the KDE bug report.
I want to report the same here as I just did on http:// bugs.kde. org/show_ bug.cgi? id=170462.
I've tried building xserver-xorg-core without some Ubuntu/Fedora specific patches. A build of xserver-xorg-core without the '107_fedora_ dont_backfill_ bg_none. patch' patch doesn't seem to have any video garbage. Steps you can use to reproduce are on the KDE bug report.