I'm running ASCII and attempting to get a Canon LiDE 220 scanner to
work. It is fully supported by SANE and I know that others are using
it. I've installed the packages: sane, libsane, libsane-common,
sane-utils, xsane, etc. In /etc/group I have:
scanner:x:110:saned,haines
saned:x:112:haines
The problem is that I can't access the device because it has
different device numbers on the bus.
$ lsusb
...
Bus 001 Device 051: ID 04a9:190f Canon, Inc.
...
Only one sg* interface has an ACL (cdrom):
$ ls -l /dev/sg*
...
crw-rw----+ 1 root cdrom 21, 3 Jul 20 18:20 /dev/sg3
I go to see what device on the USB bus has an ACL. These two have
them:
$ ls -l /dev/bus/usb/*/*
...
crw-rw-r--+ 1 root lp 189, 48 Nov 10 11:49
/dev/bus/usb/001/049
crw-rw-r--+ 1 root root 189, 51 Nov 10 11:49
/dev/bus/usb/001/052
Device 049 is my printer, and so I investigate device 052:
$ getfacl /dev/bus/usb/001/052
...
# owner: root
# group: root
user::rw-
group::rw-
group:scanner:rw-
So in fact the scanner is Bus 001 Device 052. But this is
contrary to what lsusb says. I appears that I can't access
the scanner because sane has the wrong device number.
The command # scanimage -L simply hangs. When run in authlog I
get:
Nov 10 13:05:15 ... USER=root ; COMMAND=/usr/bin/scanimage -v -L
Nov 10 13:05:15 ... session opened for user root by haines(uid=0)
Otherwise the logs say nothing.
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