oh, and i get those messages, when this happens: kernel: usb 3-2: reset low speed USB device using uhci_hcd and address 3 which is either my mouse and/or my weird finger-print sensor. $ lsusb Bus 001 Device 001: ID 0000:0000 Bus 004 Device 001: ID 0000:0000 Bus 005 Device 001: ID 0000:0000 Bus 003 Device 003: ID 046d:c00c Logitech, Inc. Optical Wheel Mouse Bus 003 Device 002: ID 08ff:2580 AuthenTec, Inc. Bus 003 Device 001: ID 0000:0000 Bus 002 Device 002: ID 03f0:171d Hewlett-Packard Bus 002 Device 001: ID 0000:0000 does someone know how i can disable a usb device completely? regards, toby