[sane-devel] Canoscan Lide 210 - Green Bands on the left margin

[Toni LDG]

Hi

Same versions here. Debian Unstable laptop.

    toni at watson:~$ scanimage -V
    scanimage (sane-backends) 1.0.24; backend version 1.0.24


I also tested it with latest Ubuntu 14.04 and find the same issue.
Is there any other piece of software involved to check versioning?


And about the Windows vs Linux thing,... yes it is very strange however i
do not know how both work internally to compare but I assume they work
differently.

For example, when i plug the scanner while in Windows, i see scanner is
enabled and the lamp is lit in green, then it moves a little up, then goes
down and parks again.  On linux however this is not done at all when
plugged. Do not know what is the purpose of that action.:-)

Without knowing the internals of the drivers and the device is difficult

  One supposition i make is that the calibration on windows is differently
done compared to Linux.

  The second supposition is that the Windows driver hides the deffect on
purpose making some kind of editing to the images or has a different color
profile....

Other idea is coming from the fact that yours works ok. This makes me think
that either mine is faulty or slightly different hardware.

Regards.



2014-07-09 12:46 GMT+02:00 Thorsten Müller <thorsten at mueller-kleinheinz.de>:

> Am Dienstag, 8. Juli 2014, 22:07:42 schrieb Toni LDG:
> > Hi all.
>
> Hi!
>
> > I just received a Canoscan LiDE 210 and just try to get it working
> > properly.
> >
> > Just noticed that when using it in Linux, the results of any kind of
> > scan shows a couple of small green bands on the left side, vertical
> > and about 1 cm width.
> >
> > The strange thing is that those bands are Not shown when scanning from
> > Micrososft Windows with the Canon suplied driver.
> > There image there is perfect. It seems to only affect Sane.
> >
> > I've tried both on Debian unstable and on Ubuntu 14.04 but same
> > results.
> >
> > Also tried re-calibrating the scanner from Windows several times, but
> > same issue.
> > Removing the calibration file and again.
> >
> > Also from different front-ends (xsane and skanlite) same results.
> >
> > The fact that only affects Linux makes me wonder if is some kind of
> > software issue or is a faulty hardware.
> > I am in time to return it but just wanna know first if i am doing
> > something wrong, or is a software issue.
>
> I can see the slight colour error on the left margin of your Linux scan,
> though I had to look very carefully. I did a check with my own LiDE 210
> and could not find any colour distortions - so it might be a hardware
> error, though it amazes me that the Windows scan software removes the
> colour errors.
>
> Perhaps it depends on the sane version? My version is
>
> ,----[  ]
> | [12:28] tm at dungeonmaster:~ $ scanimage -V
> | scanimage (sane-backends) 1.0.24; backend version 1.0.24
> `----
>
> Greetings
> Thorsten
>
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