> Try "acpi=noirq" as a kernel argument. Some AMD chipsets have problems > letting the OS know what irq the 8250 timer is on, the nvidia one is > definitely a problem, I have the same chipset in a couple of Dell > Dimension e521 desktops :-( Alright, this didn't solve the issue either. So far: - noacpi noapic (No effect) - New SATA drive (No effect) - acpi=noirq (No effect) - BIOS update to 1.6 (No effect) Grabbing a copy of RHEL 5.1 now and we'll throw this over to RH support I guess and file something in bugzilla over there. Gotta be something funky in sata_nv. Thanks everyone for your responses. Ray