http://ubuntuforums.org – My USB-subsystem ist not really that stable I wanted it to be: Sometimes it just stops working (mostly after I locked the screen under GNOME). Now I found recommendations how to restart the USB-subsystem without restarting the whole system: Code: sudo /etc/init.d/udev restart it made the following output Code: baruch@baruch-laptop:~$ sudo /etc/init.d/udev restart (Hardware)