By looking at /proc/interrupts, I see that there are 20 interrupts/second on the IDE channel that has two empty CD-ROM drives (actually one CD and one DVD) when running the GNOME desktop from a Workstation install of FC4. [cat /proc/interrupts; sleep 10; cat /proc/interrupts ==> delta of 200] Is there a setting to reduce the frequency to only 1/second per drive, or to turn off polling completely? --