[sane-devel] BenQ Scanner 5250C support

[Oliver Schwartz]

Hi,

> I've 5250C benq scanner that I would like to get working under
> linux. I've tried the sane CVS snapshot from December 4th 2005
> without any luck. After some time spent by googling I've found
> following information:
>
> http://lists.alioth.debian.org/pipermail/sane-devel/2004-December/0
>12769.html
>
> After adjustments according the the mail above I've managed to get
> at least some output - the same (I guess) as Benjamin got: scanned
> image with color strips when scanning b&w original. 

Both the 5150 and the 5250 (which seem to have the same hardware) 
currently suffer from this problem. I got a usb trace of a windows 
scan from Andrew Walrond last week and started to do some analysis. 
The colour problem is currently unsolved, however.

There are two commands which work differently from other scanners. One 
of the command is the calibration command. Currently it's my main 
suspect for the colour problem. However, since there is no 
documentation at all, I can't promise that the 5150/5250 will be 
supported any time soon.

> I have tried the "acerfirm -q" as described here:
>
> http://lists.alioth.debian.org/pipermail/sane-devel/2004-April/0107
>16.html
>
> but with following results:
>
> $ ./acerfirm -q
> Can't open scanner device at ./acerfirm line 142.

acerfirm does not work with libusb. It's obsolete anyway since the 
firmware is downloaded by the backend directly.

/Oliver