Problem Scanning with Epson RX520

Hi Guys,

I got a report from a user of the OS/2 version of Sane that
the Epson 
RX520 isn't working.  Debug log is at http://smedley.ingo/deb
ug.txt

Scan ends with:
scanimage.exe: sane_start: Operation not supported

Only real hints (to me) in the log are:
[epson] sane_start()
[epson] scanner is already open: fd = 0
[epson] You may have to power off your TPU
[epson] Also you may have to restart the Sane frontend.
[epson] open_scanner()
[epson] scanner is already open: fd = 0
[epson] You may have to power off your TPU
[epson] Also you may have to restart the Sane frontend.

Any clues on how to get this working?

-- 
Cheers,

Paul.


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"Paul Smedley" <paulatsmedleydot.info> writes:

> Hi Guys,
>
> I got a report from a user of the OS/2 version of Sane
that the Epson 
> RX520 isn't working.  Debug log is at http://smedley.ingo/deb
ug.txt

FWIW, the epson backend doesn't claim it's supported in
any way.  The
epkowa backend does.

# Is that URL valid?  Looks like my DNS server doesn't know
about
# smedley.ingo ...

> Scan ends with:
> scanimage.exe: sane_start: Operation not supported
>
> Only real hints (to me) in the log are:
> [epson] sane_start()
> [epson] scanner is already open: fd = 0
> [epson] You may have to power off your TPU
> [epson] Also you may have to restart the Sane frontend.
> [epson] open_scanner()
> [epson] scanner is already open: fd = 0
> [epson] You may have to power off your TPU
> [epson] Also you may have to restart the Sane frontend.
>
> Any clues on how to get this working?

Wow!  This is the same behaviour I saw when I mentioned in

  http://lists.alioth.debian.org/pip
ermail/sane-devel/2006-September/017763.html
that not all epkowa supported devices are supported by the
epson
backend, even if you don't need a binary-only non-free
plugin.

FTR, that happened with Debian GNU/Linux (testing/unstable)
on i386
and amd64.

With the epkowa backend things work fine on i386 (haven't
tried amd64)
and the code that is responsible for the TPU related message
is the
same for both backends ...

I've compared the ESC/I command sequence of both backends
and the only
difference I noticed (from memory) is the use of 'ESC i'
in the epkowa
backend whereas the epson backend didn't.  Logically, that
should not
matter though.

Hope this helps,
-- 
Olaf Meeuwissen                          EPSON AVASYS
Corporation, SE1
FSF Associate Member #1962           sign up at http://member.fsf.org/
GnuPG key: 6BE37D90/AB6B 0D1F 99E7 1BF5 EB97  976A 16C7 F27D
6BE3 7D90
Penguin's lib!       -- I hack, therefore I am --          
    LPIC-2

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