Comment sounds like a little possibility, i.e. my PC doesn't support MWI. /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */ retval = pci_set_mwi(pdev); if (!retval) ehci_dbg(ehci, "MWI active\n"); Block is in ehci-pci.c at line 56. Does commenting it out, installing and cold booting help? Thanks, Karsten -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html