Hello, After upgrading my kernel from 2.6.18-164.15.1.el5 to 2.6.18-194.8.1.el5, I found that my machine would go through periods of running very slowly wit h the mouse moving jerkily. Top showed 98%+ wait state, although nothing wa s going on. The machine is an HP 64 bit dx5150 with 3G of memory and X1300
graphics. I have been running the proprietary ATI fglrx driver because i t appeared to be the only way of getting a pseudocolor visual for the xwave s speech processing package, whose graphics are based on xview. I've been using it for several years and not seen anything like this before. I noticed that hald-addon-storage was occasionally using large amounts of cpu time polling my empty dvd drive, so I killed that process, but that didn't solve the problem. Then I found that the xwaves display was showi ng the wrong colors and scaling was distorted. Reverting to the old kernel makes everything work normally again. I susp ect that it's X that is the problem, although I don't know for sure. Nothing interesting shows up in the xorg log or any other log that I can find. Has anyone else seen symptoms like this? Any hints on what to try? In particular, is there a way of finding out what the cpu is waiting on when it is spending all its time waiting? Thanks. Stephen Isard
