[sane-devel] [HP3670] Black image after scan (GIT at 3c0b4649bd9a04d3f848d346b656bbbf3d39c7e1)

[stef]

Le vendredi 25 septembre 2009 14:09:14 m. allan noah, vous avez écrit :
> well, it's listed as unsupported, so the fact that it scans at all is
> pretty good :) Perhaps stef can comment further.
>
> allan
>
> On Fri, Sep 25, 2009 at 3:33 AM, Ilia Sotnikov <hostcc at gmail.com> wrote:
> > Scans with HP3670 using current GIT (at
> > 3c0b4649bd9a04d3f848d346b656bbbf3d39c7e1) results in black images.
> > Tried several modes/resolutions with the same results (hp3670_1.png),
> > although using maximum values for gamma/brightness/contrast gives dark
> > gray image (hp3670_2.png).
> >
> > The backend is accessed over the net, frontend is Xsane. Below are the
> > result images and the output fwith SANE_DEBUG_GENESYS=128 set.
> >
> > Best regards,
> > --
> >  Ilia Sotnikov
> >
> > --
> > sane-devel mailing list: sane-devel at lists.alioth.debian.org
> > http://lists.alioth.debian.org/mailman/listinfo/sane-devel
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> >             to sane-devel-request at lists.alioth.debian.org

	Hello,

	it's nice you can test the HP3670. Since I don't have the hardware, I only 
could set something from USB logs sent to me, but I couldn't validate the 
changes.
	The positive side is that the picture geometry fits the 100dpi scan in the 
log. We must be close to have it work. 
	To go further, I'd like to have more debug information, could you run 
'scanimage' like this :
export SANE_DEBUG_GENESYS=255
export SANE_DEBUG_GENESYS_GL646=255
scanimage --mode Color --resolution 100 2>scan.log >scan.pnm

and then me the log. There will also be a few debug pnm files lying around, 
please also send them to me. I will compare the traces with USB session 
recorded to find what is going on.

Regards,
	Stef