... Did it use to work with older version of sane-backends ?
No, I brought the scanner over for the purpose of testing.
Did you try setting your device to /dev/usb0 ?
Did you test it as root ?
Doesn't change things:
ian:22$ env|grep SAN
SANE_DEFAULT_DEVICE=plustek:/dev/usb0
ian:23$ scanimage >j
scanimage: open of device plustek:/dev/usb0 failed: Error during device I/O
ian:24$ sudo scanimage >j
scanimage: open of device plustek:/dev/usb0 failed: Error during device I/O
ian:25$
Scanner works on Windoze (ie known good hardware instance).
Merci!