I consider this not a bug in Simple Scan nor a bug in sane-backends!

I had an error message in Simple Scan too, indicating that it was unable
to access a "Mustek BearPaw 1200 CU" while I'm using a "Mustek 1200 UB
Plus".

This is in my opinion because different scanners basing on the same
chipset provide the same signature to the sane back ends. So you must
tell the back ends to address the correct model you use.

I resolved this problem (in Ubuntu 10.04 LTS) by following the same procedure 
as I did in 8.04 LTS two years ago, when I found many useful information on
http://wiki.ubuntuusers.de/Scanner_gt68xx
http://meier-geinitz.de/sane/gt68xx-backend/
and in the man-pages for san-mustek_usb
man san-mustek_usb (for now this seems to be man sane-gt68xx)

It took the following steps to make my scanner work with Simple Scan in 10.04 
LTS:
1. put the right firmware file in the right place
   download sbfw.usb from the website mentioned above
   and copy it to /usr/share/sane/gt68xx
   sudo cp sbfw.usb /usr/share/sane/gt68xx/sbfw.usb
   sudo chmod a+r /usr/share/sane/gt68xx/sbfw.usb
2. tell the back end to recognise your scanner as Mustek 1200 UB Plus 
   sudo gedit /etc/sane.d/gt68xx.conf
   uncomment the following line by removing the '#': #override 
"mustek-scanexpress-1200-ub-plus"
3. make sure, there is an entry for gt68xx.conf in dll.conf
   sudo gedit /etc/sane.d/dll.conf
   if there is no line like "gt68xx" create one (without the quotes)

Maybe you have to restart the backend (I don't know if this is done by
sudo /etc/init.d/saned -restart, but it worked for me).

Regards
Moritz

-- 
Simple Scan detect Mustek 1200 UB Plus as Mustek BearPaw 1200 CU
https://bugs.launchpad.net/bugs/575090
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