Comment 427 for bug 620074

I have the same issue on a machine with i845e chipset, P4-1.5 Northwood, 2GB DDR RAM, GF6800 video and Audigy2 sound card. My main HDD is 160GB IDE Seagate.

When there is disk activity the system becomes virtually unusable.

For example, when I am burning a DVD on the drive attached to SII 3512 SATA controller, the CPU load goes from 40% at 7-8x to 98% at 16x.

Downloading Fedora12 ISO last night at 500 kb/s kept system busy at 90%!

If I start kernel compile, CPU load is stable 100%, which is Okay, but switching tabs in Firefox takes 10 seconds and starting any application like JUK, Dolphin, Konsole takes up to 1 minute.

Running Fedora11 with 2.6.30.9.96 FC11 i686 PAE kernel.

The system has become a bit more responsive (by about 10-20%) since I noticed p4-clockmod was being loaded and shut it down.