[sane-devel] Information about unsupported UMAX Astra 4600

[MP]

>         from the chip's label, support for you scanner belongs to the rts8891
>  backend, even though sane-find-scanner doesn't detect it properly. Do you have
>  a windows box where you can run your scanner ? If so I'd be interested by an

I have only windows instalation inside virtualbox, but as vbox does
support bridging USB devices inside virtual machines, I was able to
scan a 75 dpi color page from the scanner, while capturing
communication using UsbSnoop.

Since the log file is 3.6Mb even after bzipping, I uploaded it to
http://wtx.wz.cz/UsbSnoop.log.bz2
In the log, actual scanning (when the scanner started warming up)
starts about 97000 ms

>  Usbsnoop (http://www.pcausa.com/Utilities/UsbSnoop/) log of a 75 dpi color
>  scan. I'd be able to tell for sure how close it is from supported models. If
>  needed I can provide some explanations on how doing it.
>         From the known information, your scanner doesn't seem to be far from the
>  Astra 4400 which isn't yet supported. Bringing support for these 2 scanners is
>  a matter of how different they are from supported models. If close, by
>  exchanging logs and test code we'd be able to have them working. But if they
>  are too different, support wouldn't be possible with access for a developer to
>  the real hardware.

What about some form of remote access?

>         If you feel like it you could add your scanner to rts8891.conf.in and
>  rts8891_devices.c source files (cloning the HP4470 entry), and have a try. Be
>  aware that when experimenting with partially supported hardware, you can't
>  exclude it could be damaged.

What type of damage can I expect from that?  Something like the
scanner lamp driving off the rails, which could be maybe fixed just by
using a screwdriver or some parts irreversibly burning out?

Martin Petricek