Has anyone else experienced what I will call sporadic, jerky X response in FC2? It seems that any time I have a background process running that is even remotely utilizing any CPU or IO, I have pathetic response in X. My RH9 box and my FC1 box don't have this issue and they are slower machines with less memory and older disk. As a test to rule out CPU or chipset specific issues, I've built a completely different machine with FC2. Both machines exhibited the exact same behavior. I quite reluctant to make the switch to FC2 without solving this issue. It's quite annoying to have X become unstable every time I go to compile something in the background. Hardware Setup #1: Asus A7V600 (VIA Chipset) 1 GB RAM Athlon XP 3000+ 2 Samsung 120 GB SATA drives (RAID1 with LVM2) NVIDIA MX440 FC2 fully updated Hardware Setup #2: Asus A7N266-VM (NVidia Chipset) 1 GB RAM Athlon XP 2100+ 2 Maxtor 40 GB ATA drives (RAID1 with LVM2) NVIDIA MX400 FC2 fully updated Upon further digging, it looks like kblockd & kjournald are chewing up a ton of CPU. I'm even noticing it when I don't have large processes running. It's definitely not as severe, but it seems to be occurring quite regularly. The one test that I haven't done is to remove LVM2 and RAID1 from the picture. I wonder if that would eliminate the problem? What exactly is the function of kblockd and kjournald? Any insight would be greatly appreciated. Thanks, Brian Hanks bhanks@xxxxxxxxxx