I just built a new system using the components in my subject line. The motherboard has built-in sound chip using the ALC850 CODEC. I also have an nVidia 6600GT. Installation of FC4 x86_64 went fine, and all my hardware was auto detected. However, I noticed some strange behavior. When the CPU was busy, either with compiling something or running up2date (there have been a LOT of updates since the distro was released), several things happened. My keyboard was acting up--one keypress would produce several characters, making typing impossible. And my clock would gain lots of time--up to 10-15 extra minutes in a 30 minute period. I also noticed that my sound was pretty bad--Wesnoth music was choppy, and sound effects were delayed and some didn't play. I looked at dmesg and saw a message saying something to the effect of a driver hogging interrupts or an "instable (sic)" clock source. I'm using NTP for my clock sync. So I disabled AC97 in the bios, and these issues went away. I re-enabled it, and my video settings went back to default for some reason (editing xorg.conf fixed this). Now sound is still pretty bad, and my clock is still gaining time, but I haven't gotten the hogging interrupts message again. I also noticed another message from dmesg: application mixer_applet2 uses obsolete OSS audio interface Does anyone have any idea what's going on? Is this a motherboard problem? BIOS? kernel? audio driver? Any suggestions on how to fix this? Thanks, Dan
