[sane-devel] [HP3670] Black image after scan (GIT at 3c0b4649bd9a04d3f848d346b656bbbf3d39c7e1)
stef.dev at free.fr
Sat Sep 26 05:23:04 UTC 2009
Le vendredi 25 septembre 2009 09:33:48 Ilia Sotnikov, vous avez écrit :
> 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,
in fact in the log you sent, there was enough data to check your test run
against a reference USB log sniffed under windows. I haven't noticed anything.
May be it is an analog frontend issue. There is code to handle the HP3760
frontend, but it is commented out and treated like other frontends. You could
try to uncomment this code, recompile and see if it brings better results. The
code is from line 1830 to 1846 in gl646_set_fe() function, genesys_gl646.c
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