[sane-devel] HP ScanJet 2300C and genesys backend

[Stéphane VOLTZ]

Le Dimanche 12 Juin 2005 22:44, Nightwulf a écrit :
> 1. xscanimage:
> - 600dpi res, color, 16bits -> pic seems to be distorted (looks like a
> picture for the old 3d-glasses, red and green for left and right eye)
> - acquire preview doesn't work, the scan light carrier seems to hit the
> front of the scanner case (switched off quickly then)
>
	Does it happen at every resolution ? Can you send a sample image ?

> 2. kooka
> - 600 dpi, color mode seems to hang up the scanner...the scan light seems
> to do one step forward and one back all the time

	There is a bandwidth problem with libusb. When the scan is too wide
at high resolutions, data aren't read fast enough, and the scanner has to
pause (by going backward) waiting for the frontend. There's nothing that
can be done fixing that.

> - preview doesn't work, scanning lights are switched on and then nothing
> happens anymore

	Unfortunately, there is a bug related to USB. HP2300C get stuck in warmup
after another session of a frontend ended. Re try with unplugging/plugging 
scanner's usb cable.

>
> 3. scanimage
> - no problems so far using only standard scans (whole page, gray or color
> mode)
>
> I hope this helps. Please don't hesitate to tell me if I can be of further
> help.
>
> Greets,
>
> Torsten

Regards,
	Stef