On Tue, Sep 12, 2017 at 09:21:33PM +0200, MENGUAL Jean-Philippe wrote:
We have Epson Perfection 3490 and Canon Lide 120.While /dev/bus/usb/001/0XX is owned by root:root,, but as well by the scanner group (where my user is), it is not the case with Canon, the device is owned only by root:root.
Take a look at /lib/udev/rules.d/60-libsane.rules and /usr/share/doc/libsane/README.Debian.gz
The lsusb command should show you the vendor and product ids. Mike Stone