Created attachment 317185 [details] The whole dot .kde dir Description of problem: Selecting 'enable desktop effects' from System-Settings -> Desktop crashed kde session and could not be started again Version-Release number of selected component (if applicable): kdebase-4.1.0-1.fc9.1.i386 kdebase-workspace-4.1.0-8.fc9.i386 kdebase-runtime-4.1.0-3.fc9.i386 kde-settings-4.0-25.fc9.noarch How reproducible: as described in description Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
Created attachment 317186 [details] debug output
Simply put, your video hw/driver apparently doesn't support compositing. kwin is *supposed* fail more gracefully than this, however. kde-4.1.1 has a few fixes that may help here. In the meantime, you can manually disable compositing (desktop effects), but editing ~/.kde/share/config/kwinrc, and change [Compositing] Enabled=true to [Compositing] Enabled=false
AFAIK, the test to check if compositing is actually working is not in 4.1.x, only 4.2. OpenSUSE has a backport we could snatch though. Note that 4.2 and OpenSUSE's backport also enable compositing by default (because it has this self-test and automatic fallback now), this is something I don't think is a good idea in an F9 update at this point.
Closing this as NOTABUG since its a hardware issue.