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alexpevzner / sane-airscan

Scanner Access Now Easy - universal driver for eSCL (Apple AirScan) and WSD
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ADF source fails with HP ScanJet Pro 2000 s2 #314

Closed gabrieleturchi closed 9 months ago

gabrieleturchi commented 10 months ago

When scanning with scanimage --source "ADF Duplex" everything works fine, but without --source options, or with plain ADF argument (the default), the image appear to be a narrow and very long grey bar.

alexpevzner commented 10 months ago

Hi @gabrieleturchi,

can I see protocol trace?

In the /etc/sane.d/airscan.conf uncomment the following lines:

[debug]
trace = ~/airscan/trace

Trace files will be in the ~/airscan/trace directory which will be created automatically. .tar files are not needed for now, .log files would be enough

gabrieleturchi commented 10 months ago

Here the traces.

scanimage-zeroconf.log scanimage-HP-ScanJet-Pro-2000-s2-(USB).log

alexpevzner commented 10 months ago

Could you please test with the following options: scanimage -y 355.6mm

gabrieleturchi commented 10 months ago

It works. I suppose that this driver/scanner doesn't support the auto detection of the end of the page...

alexpevzner commented 10 months ago

What if you insert A4 page and request scan with scanimage -y 700mm?

Or, better, could you play a little bit around the -y option trying to find situation where the scanning breaks?

alexpevzner commented 9 months ago

Ping

alexpevzner commented 9 months ago

Hi @gabrieleturchi,

I'm about to release next version of sane-airscan within few days.

Your device reports max image size 215.90x3098.80 mm when used in the non-duplex ADF mode (please notice the height). Probably it means it can scan not only pages, but continuous documents as well.

But image of that size is actually requested for scanning (what scanimage does, if size is not explicitly specified) it returns whatever you see.

Probably if I artificially limit image height for your device in the driver, everything will work as expected.

However I need your help here to figure out the reasonable heigh limit. I don't have my own access to such a device.

Thanks in advance!

gabrieleturchi commented 9 months ago

Hi alex. Sorry, my first report was not precise: in fact, the narrow grey bar had on the top the image of the page... (shame on eog who showed only the grey background...). It is the scan of a 3 meters long page... Apparently, in non-duplex mode the scanner read for the full height, when in duplex mode it detects the end of the paper (not very precise, I can see at least 10% extra height in grey, but a different grey of the background).

alexpevzner commented 9 months ago

Looks that the problem actually doesn't exist. I've also asked a colleague who has a similar device to retest just in case, and colleague confirms that everything is OK for him.

So closing the issue...

gabrieleturchi commented 9 months ago

So, you confirm that there is no way to detect the end of the page in single side mode? Not very handy... I suggest to implement a default y size (if not specified by the user) around 33 cm. In any case, a notice in the documentation could be useful, I think.

Thank you.