Comment 89 for bug 772207

Not sure if this is related...
I've instlaled both Kubuntu 11.04 and Ubuntu 10.10 on my desktop with a MSI GeForce GTS 450 and both installations have the same results, except:

In Kubuntu 11.04, I get the famous "Activated but not in use" message, while in Ubuntu 10.10 I don't get this message.
Both installations used nvidia-latest, which at the time, was 275.09.07.
Both installations had no issue using Extra effects and decking out the desktops with all kinds of special effects.

After about 2-3 hours of computing, or opening anything using graphics (not sure the connection) everything display wise slows to a crawl, with framerates in the area of 3-4 fps. this happens when I play Minecraft (a java game), do ANYTHING with wine, even configuration, or if the screensaver takes over. Youtube seems to be fine. Looking at top, free -m and system monitor show no issue with high memory or CPU usage, so it must be something related to graphics. A quick check shows that the graphics card is not overheating or anything, either, because I can play Crysis 2 with almost max graphics settings without much of any lag on Windows without the thing overheating (that and the temp of the GPU is like..49-51C on a hot day)

this makes the PC absolutely useless until I can figure out how to fix it.