Martin Steigerwald wrote: > I think there was an environment variable for that... Hi Martin, I had the same problem with the same configuration. Kwin was saying it could not use direct rendering. I managed to get it working forcing KWIN_DIRECT_GL to 1. For this, I use a shell script on ~/.kde/env with: #!/bin/bash export KWIN_DIRECT_GL=1 I hope this will help you. Yannick