We upgraded our Internet server to CentOS 5 from RedHat 4. Now we can't use the USB port. dmesg returns: usbcore: deregistering driver usb-storage Initializing USB Mass Storage driver... usbcore: registered new driver usb-storage USB Mass Storage support registered. USB Universal Host Controller Interface driver v3.0 PCI: Enabling device 0000:00:07.2 (0000 -> 0001) PCI: No IRQ known for interrupt pin D of device 0000:00:07.2. Probably buggy MP table. uhci_hcd 0000:00:07.2: Found HC with no IRQ. Check BIOS/PCI 0000:00:07.2 setup! uhci_hcd 0000:00:07.2: init 0000:00:07.2 fail, -19 PCI: Enabling device 0000:00:07.3 (0000 -> 0001) PCI: No IRQ known for interrupt pin D of device 0000:00:07.3. Probably buggy MP table. uhci_hcd 0000:00:07.3: Found HC with no IRQ. Check BIOS/PCI 0000:00:07.3 setup! uhci_hcd 0000:00:07.3: init 0000:00:07.3 fail, -19 The hosts (across the country) tell us CentOS doesn't support USB 1 ! I find this unbelievable. Can anyone set me straight? Thanks.