[sane-devel] Only superuser can scan

[Nigel Ridley]

Antony Gelberg wrote:
> Hi all,
> 
> This is a Debian testing box.  The normal user can't scan, but it's
> different to permissions problems that I've seen before.  He can see a
> scanner, but there is a question mark in the (incomplete) output of
> sane-find-scanner.  It's a Canon lide 60 (genesys backend).  I have
> bodged the permissions on /proc/bus/usb/001/002 to allow all rw, but no
> difference.  It's running 2.6.15, with udev, not hotplug.
> 
> aft:/home/dr# sane-find-scanner -q
> found USB scanner (vendor=0x04a9 [Canon], product=0x221c [CanoScan],
> chip=GL841) at libusb:001:002
> aft:/home/dr# su dr
> dr at aft:~$ sane-find-scanner -q
> found USB scanner (vendor=0x04a9, product=0x221c, chip=GL841?) at
> libusb:001:002
> dr at aft:~$ id
> uid=1001(dr) gid=513(Domain Users)
> groups=46(plugdev),110(scanner),111(saned),513(Domain Users)
> dr at aft:~$ ls -l /proc/bus/usb/001/002
> -rw-rw-rw- 1 root root 57 2006-07-02 17:26 /proc/bus/usb/001/002
> dr at aft:~$ scanimage --version
> scanimage (sane-backends) 1.0.17; backend version 1.0.17
> dr at aft:~$ uname -a
> Linux aft 2.6.15-1-k7 #2 Mon Mar 6 15:42:39 UTC 2006 i686 GNU/Linux
> 
> Any advice would be appreciated.
> 
> Antony
> 
 >

I have a similar problem with an Epson all-in-one and in the end, as a 
work-around, I just changed the permissions on /proc/bus/usb/001/002
by issuing:
sudo chgrp scanner /proc/bus/usb/001/* /proc/bus/usb/002/* -R

(the above is all one line and you might need to change the 'sudo' to 
'su' - I'm using Kubuntu Dapper Drake). You will also need to add all 
users of the scanner to the 'scanner' group (I wasn't sure if the 
scanner would always use 001 or maybe 002, so that is why I changed 
permissions on both of them).

If you can figure out a way to make the changes permanent (not a boot 
script - because sometimes the scanner gets unplugged but the computer 
stays on) then I would love to hear it.

Blessings,

Nigel

-- 
PrayingForIsrael.net
http://www.prayingforisrael.net/

Messianic E-Cards.com
http://www.messianicecards.com/