I confirm this still happens on Quantal.
$ scanimage -L device `niash:libusb:002:005' is a Hewlett-Packard ScanJet 3400C flatbed scanner $ scanimage > /dev/null scanimage: open of device niash:libusb:002:005 failed: Device busy $ ls -l /dev/bus/usb/002/005 crw-rw-r--+ 1 root root 189, 132 Dec 8 16:06 /dev/bus/usb/002/005
Unplug and replug the usb cable -> scanner works fine in xsane.
I confirm this still happens on Quantal.
$ scanimage -L libusb: 002:005' is a Hewlett-Packard ScanJet 3400C flatbed scanner 002:005 failed: Device busy usb/002/ 005 usb/002/ 005
device `niash:
$ scanimage > /dev/null
scanimage: open of device niash:libusb:
$ ls -l /dev/bus/
crw-rw-r--+ 1 root root 189, 132 Dec 8 16:06 /dev/bus/
Unplug and replug the usb cable -> scanner works fine in xsane.