USB-scanner permissions

[Johann Spies]

I have an Epson Perfection 3170 PHOTO scanner which worked
perfectly under Breezy.  After upgrading to Dapper, I can use it
as root, but not as normal user.

I use Iscan (from Avasys) with the scanner, but if I run Gimp or
Xsane as root, I can operate the scanner too.

Most of the documentation tells me to find where the scanner is
using "$ sudo scanimage -L"  which tells me:
device `epkowa:libusb:004:004' is a Epson Perfection 3170 flatbed scanner

According the the documentation (i.a. "man sane-usb" ) the
following should allow the normal user to use the scanner in
this case:

$ sudo chmod 660 /proc/bus/usb/004/004

But that is not working for me. 

As I understand it the hotplug plays a role here, but hotplug is
no longer an Ubuntu package and I suspect that something has to
be done to udev to get this working.  But I know too little
about udev ...

Any idea on how to fix this?

Johann
-- 
Johann Spies          Telefoon: 021-808 4036
Informasietegnologie, Universiteit van Stellenbosch

     "And Jesus answering said unto them, They that are
      whole need not a physician; but they that are sick. I
      come not to call the righteous, but sinners to
      repentance."                     Luke 5:31,32