[sane-devel] Epson backend reporting impossible values, was, [gscan2pdf-help]

Sat Feb 27 21:24:45 UTC 2010

Summary: sane reports that my scanner, which was working fine before I did
some Ubuntu upgrades, now possesses 0 scanning capabilities. This is a bug
on someone's part, and Ratcliffe suggested I try here. (I got no replies in
the IRC channel.)

Forwarded conversation
Subject: Re: [gscan2pdf-help] gscan2pdf-help post from
gwern0 at gmail.comrequires approval
------------------------

From: *Jeffrey Ratcliffe* <jeffrey.ratcliffe at gmail.com>
Date: Wed, Feb 17, 2010 at 3:16 AM
To: gscan2pdf-help at lists.sourceforge.net

On Wed, Feb 17, 2010 at 01:37:07AM +0000,
gscan2pdf-help-owner at lists.sourceforge.net wrote:
> Out of the box, jaunty gscan2pdf failed to scan with an array of error
> messages. I upgraded it and most of its deps to Karmic in the hopes
> things had been fixed, but no dice. So then I did a git clone and
> began working with *that*. After a great deal of fiddling with CPAN
> and debuild for things the configure script did not seem to pick up or
> flag as missing, I ran bin/gscan2pdf with great hopes - and it failed
> on scanning with much the same error.

It looks as though the SANE backend process is not finishing
cleanly. Can you scan with scanimage?

Regards

Jeff

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----------
From: *Gwern Branwen* <gwern0 at gmail.com>
Date: Wed, Feb 17, 2010 at 9:57 AM
To: Jeffrey Ratcliffe <jeffrey.ratcliffe at gmail.com>
Cc: gscan2pdf-help at lists.sourceforge.net

No; in fact, all of the 'frontend' (as the preferences call them) seem
to be broken. Attached is screenshot & --debug for 'scanimage'.

--
gwern

----------
From: *Jeffrey Ratcliffe* <jeffrey.ratcliffe at gmail.com>
Date: Wed, Feb 17, 2010 at 1:57 PM
To: gscan2pdf-help at lists.sourceforge.net

The reason that hasn't worked is that scanimage is reporting no
resolutions available:

   --resolution dpi [0]
       Sets the resolution of the scanned image.

The available scan area is also 0:

   -l 0..0mm [0]
       Top-left x position of scan area.
   -t 0..0mm [0]
       Top-left y position of scan area.
   -x 0..0mm [0]
       Width of scan-area.
   -y 0..0mm [0]
       Height of scan-area.

What happens if you try on the command line:

scanimage --device-name='epson:libusb:001:012' --mode='Binary'
--source='Flatbed' > image.pnm

?

The epson backend doesn't seem to be in a good state.

Regards

Jeff

------------------------------------------------------------------------------
SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
http://p.sf.net/sfu/solaris-dev2dev

----------
From: *Gwern Branwen* <gwern0 at gmail.com>
Date: Fri, Feb 19, 2010 at 11:44 AM
To: Jeffrey Ratcliffe <jeffrey.ratcliffe at gmail.com>
Cc: gscan2pdf-help at lists.sourceforge.net

On Wed, Feb 17, 2010 at 1:57 PM, Jeffrey Ratcliffe
> --source='Flatbed' > image.pnm

[11:41 AM] 248Mb$ scanimage --device-name='epson:libusb:001:012'
scanimage: open of device epson:libusb:001:012 failed: Invalid argument

[11:42 AM] 248Mb$ scanimage -L
device `epson:libusb:001:014' is a Epson  flatbed scanner
[11:43 AM] 248Mb$ scanimage --device-name='epson:libusb:001:014'
scanimage: sane_start: Invalid argument
[11:43 AM] 248Mb$ scanimage -L
device `epson:libusb:001:015' is a Epson  flatbed scanner
[11:43 AM] 248Mb$ rm image.pnm; scanimage
--device-name='epson:libusb:001:015' --mode='Binary'
--source='Flatbed' > image.pnm
scanimage: attempted to set inactive option source
[11:43 AM] 248Mb$ rm image.pnm; scanimage
--device-name='epson:libusb:001:015' --mode='Binary' > image.pnm
scanimage: sane_start: Invalid argument
[11:43 AM] 248Mb$ scanimage -L
device `epson:libusb:001:016' is a Epson  flatbed scanner
[11:43 AM] 248Mb$ rm image.pnm; scanimage
--device-name='epson:libusb:001:016' > image.pnm
scanimage: sane_start: Invalid argument
[11:44 AM] 248Mb$

(I tried turning off & on the scanner before each scanimage -L, hence
the incrementing.)

--
gwern

----------
From: *Jeffrey Ratcliffe* <jeffrey.ratcliffe at gmail.com>
Date: Sat, Feb 20, 2010 at 9:39 AM
To: Gwern Branwen <gwern0 at gmail.com>
Cc: gscan2pdf-help at lists.sourceforge.net

Try scanimage --device-name='epson:libusb:001:012' --help

just to check the option names are correct, but assuming they are,
this is a problem for the sane-devel list.

Regards

Jeff

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----------
From: *Gwern Branwen* <gwern0 at gmail.com>
Date: Mon, Feb 22, 2010 at 11:14 AM
To: Jeffrey Ratcliffe <jeffrey.ratcliffe at gmail.com>
Cc: gscan2pdf-help at lists.sourceforge.net

On Sat, Feb 20, 2010 at 9:39 AM, Jeffrey Ratcliffe
[11:11 AM] 1355Mb$ scanimage --device-name='epson:libusb:001:003'
--help &> output

I'm not entirely sure what you're looking for, so I've attached the
entire output:

[11:11 AM] 1355Mb$ scanimage --device-name='epson:libusb:
001:003'
--help &> output

I notice that your previous suggested commands all had the
'--option=value' syntax, but the output says things like '--mode
Binary|Gray|Color [Binary]'.

--
gwern

On Mon, Feb 22, 2010 at 11:50 AM, Jeffrey Ratcliffe <
jeffrey.ratcliffe at gmail.com> wrote:
> On Mon, Feb 22, 2010 at 11:14:17AM -0500, Gwern Branwen wrote:
>> I'm not entirely sure what you're looking for, so I've attached the
>> entire output:
>>
>> [11:11 AM] 1355Mb$ scanimage --device-name='epson:libusb:001:003'
>> --help &> output
>
> Yes. There is a problem with the backend - it is reporting 0
> resolution and page size! I would start back posting this output on
> sane-devel and see if you get any joy there.
>
>> I notice that your previous suggested commands all had the
>> '--option=value' syntax, but the output says things like '--mode
>> Binary|Gray|Color [Binary]'.
>
> That is just showing you the options - i.e. the --mode option could be
> binary, gray or color, but defaults to binary if you don't specify it.
>
> Regards
>
> Jeff
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