[sane-devel] Newb for Canon 4400F

m. allan noah kitno455 at gmail.com
Wed Jul 22 00:30:30 UTC 2009

Appears to be a Genesys logic GL841 chipset, based on prior user
reports. This is good because it means the existing sane genesys
backend can probably be modified to talk to the scanner. This is bad
because the genesys chips can be wired alot of different ways by the

If you get some usb sniffer logs of the windows driver in action, and
google for the gl841's datasheet, and take a look at the gl841 parts
of the genesys backend, you can decide if you want to go thru with it
:) Also, the backend authors have some tools that they use to clean
sniffer logs, see: http://www.pirsoft-dsl-dropzone.de/

Oh- and welcome to the team.


On Tue, Jul 21, 2009 at 8:05 PM, JayV<warmer at gmail.com> wrote:
> Hey all,
> I just joined this group after finding out that Canon (still) does not
> have a linux driver for my 4400F flatbed scanner.  It works
> fine under Windows XP in vmware but I want to write a
> driver for linux.
> A couple years ago my day job was to write a bunch of USB
> drivers for some proprietary hardware in gaming machines,
> so I know about the linux kernel 2.6 and USB 2.0 drivers.
> However, I  don't know where to start with this scanner.
> I'd really appreciate if someone could get me started with
> how to poke this machine to see what makes it go.  Any
> suggestions for how to experiment are most welcome.
> I look forward to working with you all.
> Thanks,
> J
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