Re: QNAP TS 101 as sane- server -problem

[Helge Muehlmeier <H_Muehlmeier%gmx.de@localhost>]

On 03/03/14 10:27, Frank Wille wrote:
> On Sun, 02 Mar 2014 22:05:48 +0000
> Helge Muehlmeier <H_Muehlmeier%gmx.de@localhost> wrote:
>
> > I want to use this device as scanner-server using sane and I made a
> > working setup with a custom kernel.
> Nice! Can you give some more information about the setup? That would
> certainly be interesting to read for others.

I will describe my setup tomorrow because I'm running out of time today :-(

> I guess you used sane-backends from pkgsrc? Any other configurations
> required?
Yes. sane-backends from pkgsrc. man "saned" is a good starting point... 
(but I will describe it soon in this thread :-))


> Which scanner model?
I use a Epson Perfection 1260 (with this model I was able to setup a 
scanner server years ago on a OpenBSD system)


> I have an old USB scanner somewhere. Maybe I can try to set it up on a
> sandpoint-NAS myself, so we can see if it is a general problem.
That sounds interesting...

> > My problem is, that the scanned images on my workstation are in a very
> > poor quality... Not only if I use my workstation over a network
> > connection...
> > The images I scanned with scanimage on the QNAP device are bad, too...
> I didn't know what a scanner-server is, but I found out that "saned" can
> be used to set up such a service.
That's it :-)

> Ok, so the scanner is already providing a poor quality scan, when
> connected to the QNAP, and "saned" is irrelevant.
>
> Can you define "poor"? Is it a lower dpi resolution than expected? Or is
> the scan wrong (corrupted or swapped pixels, wrong colors)?
Is there a free webspace where some images can be uploaded? I think that 
pictures will explain it better...
> > The scanner works perfectly if I use it directly attached on my
> > workstation.
> What kind of system is that? Also running NetBSD? Using the same SANE
> configuration?
Yes NetBSD.

btw.: I used several pkgsrc branches on my QNAP. Same result...


> Unfortunately I cannot help you with SANE at all, as I never managed to
> install a NetBSD scanner myself. ;)
Lets give it a try... It is very simple and useful... My plan is to 
setup a scanner and printer service for my home- network :-)
> But it would be very strange when the same scanner delivers different
> quality with the same NetBSD and SANE version on different systems. The
> USB device driver source is machine-independant, and the QNAP has a
> standard NEC D720101 USB chip (OHCI).
>
> My first guess would be different configurations, or a problem with
> big-endian in SANE (provided your workstation is little-endian).
I have no idea about that...

> > Do I have to use different settings in my kernel?
> >
> > Here are my settings I added to the GENERIC kernel:
> >
> > #USB Generic Driver
> > ugen* at uhub? port ?
> >
> > #scanner
> > #uscanner* at uhub? port ?
> > usscanner* at uhub? port ?
> >
> > Any ideas?
> Does the scanner really talk SCSI-over-USB?
> Just use the same configuration as on your workstation.
If "usscanner" isn't in kernel I guess the scanner wouldn't be found 
with sane-find-scanner or scanimage (-L)

Greetings,
Helge