[sane-devel] Scanning from fujitsu ScanSnap S1500 Error during device I/O

[Simon Matter]

> No, Markus has uncovered a real bug. The S1500 chokes when doing high
> resolution duplex scans. The backend reads data from both sides of the
> paper, and buffers the back side. Unfortunately, we read too far ahead
> on the backside, and the scanner has problems.

I have no idea if this could be related but I have recently tested an S510
which one of our users was using at home. He said the scanner doesn't work
fine anymore. I thought of course you can not compare to the bigger ones
like fi-6230 bunt when I tried to scan duplex at - I think it was 300dpi -
it was veeeeeeery slow. It felt like being 1 or 2 minutes and that really
seems to much :)

What I remember is that it took half of the A4 paper quite fast and then
waited a long time, scanned a bit more, waited and so on until the page
was finished. The output file itself was looking fine.

Any ideas if that's related somehow, at least I guess the S510 and S1500
may be from the same "family".

Regards,
Simon

>
> Do you have the S1500 too? perhaps you could repeat the experiment:
>
> scanimage -b -d fujitsu --source "ADF Duplex" --mode color
>
> then see if out1.pnm and out2.pnm look reasonable.
>
> allan
>
> On Fri, Feb 4, 2011 at 11:28 AM, Joachim Franek
> <Joachim.Franek at t-online.de> wrote:
>> On Friday 04 February 2011 15:41:57 Markus Golser wrote:
>>> Hi I try to scan a document using my new scansnap S1500.
>>>
>>> works: scanadf -d fujitsu --mode color
>>> works: scanadf -d fujitsu --mode lineart
>>> works: scanadf -d fujitsu --mode halftone
>>> works: scanadf -d fujitsu --source "ADF Duplex" --mode Lineart
>>> works: scanadf -d fujitsu --source "ADF Duplex" --mode Halftone
>>>
>>> fails: scanadf -d fujitsu --source "ADF Duplex" --mode color
>> Try Color instead of color.
>>
>> From help text: scanimage --help
>>
>> Options specific to device `fujitsu:ScanSnap S1500:35552':
>>  Standard:
>>    --source ADF Front|ADF Back|ADF Duplex [ADF Front]
>>        Selects the scan source (such as a document-feeder).
>>    --mode Lineart|Halftone|Gray|Color [Lineart]
>> ==============================
>>        Selects the scan mode (e.g., lineart, monochrome, or color).
>>    --resolution 50..600dpi (in steps of 1) [600]
>>        Sets the horizontal resolution of the scanned image.
>>    --y-resolution 50..600dpi (in steps of 1) [600]
>>        Sets the vertical resolution of the scanned image.
>>
>>
>>
>> Joachim
>>
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>
>
>
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