Hi, In my new openSUSE 11.4 I'm noticing a couple of odd phenomena, which seem to be correlated: 1) Every once in a while, there's a system message (displayed in shell windows and in the notifier widget) that says "... Disabling IRQ #16" (I believe I've seen it say #19, too). 2) After a few of these "... Disabling ..." messages, I notice that drawing becomes slow and sluggish and is most noticeable with some of the desktop effects like fading in and out and the rotating cube desktop switching animation. By some measures the graphics slow-down is extreme. The glxgears FPS number drops by a factor of well over 1000! Then, while running glxgears (as it showed me FPS numbers in the teens), KWin suspended desktop effects. At that point, glxgears returned to FPS numbers in the 25,000 range. If I then re-enable desktop effects, glxgears' FPS numbers again drop into the teens (and KWin suspends desktop effects). The first time this happened, I logged out and back in (knowing this causes the Xorg server to restart and the nVidia drivers to presumably be closed and reopened) and normal performance was restored for about 3 1/2 hours before the slow-down reoccurred. This system has new hardware, all of it very fast. The video card is an nVidia GTX 550 Ti with 1 GB of RAM. I installed the proprietary nVidia driver from the repository linked from opensuse.org's Additional Repositories page. Any hints or suggestions for diagnosing this problem? Randall Schulz -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org