Comment # 21 on bug 905034 from Per Jessen

(In reply to Per Jessen from comment #20)
> (In reply to Johannes Meixner from comment #19)
> > A totally different idea:
> > 
> > Your office12-scanimage.open.strace shows:
> > ---------------------------------------------------------------------------
> > open("/home/per/.sane/hewlett-packard-scanjet-2400c.cal",...
> > ---------------------------------------------------------------------------
> > this together with what "man sane-genesys" tells about calibration
> > in particular things like
> > ---------------------------------------------------------------------------
> >   If you plug the scanner in another machine or use it with another
> >   account, calibration will have to be redone.
> > ---------------------------------------------------------------------------
> > and
> > ---------------------------------------------------------------------------
> >   --threshold percent
> >   0..100%  (in  steps of 1). Select minimum brightness to get a
> >   white point. Pixels whith brightness below that value will be
> >   scanned as black.
> > ---------------------------------------------------------------------------
> > and how your office12-scanimage-scan10.pnm looks like:
> > 
> > Perhaps your current calibration is wrong?
> > 
> > Could you move /home/per/.sane/hewlett-packard-scanjet-2400c.cal away
> > and test again and furthermore re-do the calibration and test again?
> 
> Okay, I did the following>
> 
> power off/on scanner (to reset)
> rm ~/.sane/hewlett-packard-scanjet-2400c.cal
> scanimage --mode color --resolution 300 >scan001.pnm
> >> weird colours.
> scanimage --mode color --resolution 150 >scan002.pnm
> >> weird colours.
> scanimage --mode color --resolution 300 >scan003.pnm
> >> weird colours.
> 
> I have never calibrated this scanner before, it was bought in June 2007,
> even if it came with a calibration sheet, it is long gone. Also, when I use
> it from office11 (openSUSE 13.1), it works fine.

According to "man sane-genesys" :

To do calibration, you must insert this target in the feeder then start
calibration either by passing the --calibrate option to scanimage 

I tried that, scanimage does not recognize option --calibrate  :-(