I had a problem with ACPI IRQ routing messing up the USB ehci module. I have to disable the irq routing with apci=noirq in the bootloader config in order to use the ehci module. Failing to do so results in : usb 5-1: new high speed USB device using ehci_hcd and address 3 ehci_hcd 0000:00:10.4: Unlink after no-IRQ? Controller is probably using the wrong IRQ. System : Kernel 2.6.16.18 Chipset VIA KT400A Regards Paul - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html