Re: Anyone with experience scanning with Epson
On Fri 07 Feb 2020 at 09:37:17 -0500, Michael Stone wrote:
> On Fri, Feb 07, 2020 at 10:36:11AM +0800, kaye n wrote:
> > Hello Friends!
> >
> > I'm running:
> > Kernel: 4.19.0-6-amd64 x86_64
> > bits: 64
> > Desktop: Xfce 4.12.4
> > Distro: Debian GNU/Linux 10 (buster)
> >
> > My printer is an Epson L220. It's connected to my laptop's USB port.
> >
> > The command lsusb shows:
> > Bus 002 Device 003: ID 04b8:08d1 Seiko Epson Corp.
> >
> > Therefore in the file, /etc/sane.d/epkowa.conf
> > I added this line:
> > usb 0x04b8 0x08d1
> >
> > The printer can print just fine, but ImageScan and XSane would not run.
> >
> > ImageScan says:
> > Could not send command to scanner. Check the scanner's status.
> >
> > XSane says:
> > Failed to open device 'epkowa:usb:002:003':
> > Access to resource has been denied.
> >
> > Thank you for your time!
>
> This smells like a permission problem. In your example above the scanner is
> on bus 002 device 003. (It may change as you unplug and replug usb devices,
> so check with lsusb and change the numbers below as needed.) You can see the
> permissions for that device with:
> ls -l /dev/bus/usb/002/003
> If it comes back with something that starts with:
> crw-rw-r-- 1 root root
> then it's writable only by root. A working configuration would have either
> crw-rw-rw- 1 root root
> or would having your username or a group that you're in rather than root, or
> would look like
> crw-rw-r--+ 1 root root
> indicating an ACL which you can see via getfacl /dev/bus/usb/002/003
> (there would be a line with your username in the default libsane
> configuration).
>
> Assuming the permissions look like they might be the problem, you can
> confirm that by running
> chmod o+w /dev/bus/usb/002/003
> to make the file world writable (for testing only; it isn't permantent if
> the scanner is unplugged or the system rebooted). If xsane works, you've
> found the problem. If that's the case, the next step is probably to update
> the udev configuration. If not, on to the next guess. :)
Permisions on the USB bus are managed by an ACL.
https://wiki.debian.org/Scanner
--
Brian.
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