Re: sane works, xsane not

[Dan Cherry <dscherry@bellsouth.net>]

On Tuesday 09 August 2005 08:05 am, Jean-Luc Coulon (f5ibh) wrote:
> Le 09.08.2005 13:51:16, antonio giulio a écrit :
> > problems seem for usb-permissions.
> >
> > xsane and scanimage work from root, but not for user.
> > From: /usr/share/doc/libsane/README.Debian.gz I can read that sane add
> > a scanner group and so I have launched: adduser giulio scanner -- but
> > it now works:(
> >
> > if I launch 'ls -l /dev/* | grep scanner' I have not found scanner
> > groups... maybe a bug in the package?
>
> I've an Epson 1640 su Photo
> It works with libusb so there is no specific device for it
>
> What says lsusb and then what are the permissions of the device :
>
> [jean-luc@tangerine] % lsusb
> Bus 005 Device 004: ID 0402:5635 ALi Corp.
> Bus 005 Device 001: ID 0000:0000
> Bus 004 Device 001: ID 0000:0000
> Bus 003 Device 001: ID 0000:0000
> Bus 002 Device 004: ID 04b8:010a Seiko Epson Corp. Perfection 1640SU
> Bus 002 Device 003: ID 0463:ffff MGE UPS Systems UPS
> Bus 002 Device 001: ID 0000:0000
> Bus 001 Device 002: ID 046d:08f0 Logitech, Inc.
> Bus 001 Device 001: ID 0000:0000
>
> This tells me that the scanner is on 002:004
>
> Then I can see iis permissions :
>
> [jean-luc@tangerine] % ls -l /proc/bus/usb/002
> total 0
> -rw-r--r--  1 root root    43 2005-08-09 10:53 001
> -rw-rw----  1 root nut     52 2005-08-09 14:01 003
> -rw-rw----  1 root scanner 50 2005-08-09 12:28 004
>
> Remark:
> If you add yourself to the scanner group, what you tell you have done,
> you have to close your X session and logout of any console session,
> then restart X.
>
> In my config file (namely epson.conf), I've only one line with "usb",
> this is enough to work with libusb
>
> > Thanks,
> > Giulio
>
> Regards
>
> Jean-Luc

The bus:device numbers can change each time you reboot or power off your 
scanner, so if you don't use a script to reset the permissions, you have to 
find the usb numbers each time you start up the scanner.

you can also use 
#sane-find-scanner
to identify the usb directory numbers

(btw, I don't have to restart X to use the scanner after resetting the 
permissions - I don't know why???) 
-- 
Dan Cherry
dscherry (@) bellsouth.net

Most writers regard the truth as their most valuable possession, and therefore 
are most economical in its use.  Mark Twain (1835-1910)