[sane-devel] Mustek Bearpaw 2400 CU plus scanner and gt68xx backend

[Charles Mangles]

Hi,

like Mr Ibbotson, in his mail of Fri Aug 19 15:29:19 UTC 2005, I have
recently purchased a Mustek 2400 CU plus scanner, which i connected via
a Belkin F5U222 USB2.0 cardbus card to my Toshiba Tecra 8100, which is
too old to have a USB2.0 port.  After various struggles to get
everything to work (it transpired that the scanner would kill the usb
functions unless the Belkin card was fed from its external power supply)
, I discovered I had the same problem as Mr Ibbotson, in that the
scanner would read only half the page, so that the resulting image was a
lengthways half of the A4 document in the scanner, stretched across the
page to fit an A4 sized image. 

Following the advice given subsequently, i.e. downloading the latest
PS2Dfw2.usb firmware and renaming it to PS2Dfw.usb, resulted in the
following error message when I tried to run xsane "failed to open device
gt68xx:libusb:003:003".  After unplugging the USB card and the scanner,
reinserting them and replacing the new PS2Dfw.usb file with the original
one, I tried again, only to get the error message "failed to start
scanner: Invalid argument" and a message in the kernel log.

"bayard kernel: usb 3-1: usbfs: USBDEVFS_CONTROL failed cmd xsane rqt 64
rq 1 len 64 ret -110"

Every time the scanner fails to work, I have to unplug the usb card and
the scanner from the card, reinsert the card, wait for about two minutes
and reinsert the scanner usb plug, otherwise neither sane or scanimage
can detect the scanner.

A final, possibly related, mystery is that my scanner is detected as a
usb1.1 device (full-speed), not a usb 2.0.

Has anyone any idea what I am not doing/ doing wrong?

I am running Debian Sarge 2.6.11, xsane version:

xsane-0.97 (c) 1998-2005 Oliver Rauch
  Email: Oliver.Rauch at xsane.org
  package xsane-0.97
  compiled with GTK-2.6.1
  with GIMP support, compiled with GIMP-2.2.3
  XSane output formats: jpeg, png, pnm, ps, tiff, txt

and the output of "scanimage -L" is

device `gt68xx:libusb:003:002' is a Mustek BearPaw 2400 CU Plus flatbed
scanner