A good hint: as I figured out, "sudo nautilus" work (and also nautilus-gksu) when disconnecting all USB-Devices. I found the hint on a discussion here:
http://ubuntuforums.org/showthread.php?t=844990
A good hint: as I figured out, "sudo nautilus" work (and also nautilus-gksu) when disconnecting all USB-Devices. I found the hint on a discussion here:
http:// ubuntuforums. org/showthread. php?t=844990