- Last week my gpu died and I replaced it with a Nvidia GT 640 card. Normally this card should be more than capable of playing video smoothly
- I have the latest proprietary drivers installed (GO3 from the repos).
- When playing videos (tried sevaral) I noticed an annoying horizontal video tearing and my wobbly windows effect is not very smooth.
- Now comes the strange part. When I either stop and start kwin, or change from opengl 3.1 to opengl 2.0 (or vice versa) in the kde desktop effects settings (probably causing a kwin restart?), the video tearing is gone and effects like wobbly windows are smooth again.
- After a reboot or logoff the video tearing and unsmooth effects are back:(. I have to do my little trick each boot which is very annoying.
- So it seems that kde is not using my gpu correctly somehow, until I restart the kde desktop effects.
Does anyone have any clue what could trigger this problem and how to solve it?