[sane-devel] HP 2300c scan problem with SANE USB

[Stef]

Le mercredi 8 février 2012 15:12:52 Nils Nebe a écrit :
> Hey there,
> 
> I'm trying to scan material with a HP scanjet 2300c scanner on my MAC OSX
> 1.6 system. I have already downloaded the full SANE package that you
> provide on your homepage and installed it successfully. The SANE connection
> shows up in all different scan softwares I've tried (Image Capture,
> Photoshop CS5, Exact Scan). Only in GraphicConverter it is not recognized
> at all. Now the problem is, the actual scan won't work, it's only loading
> previews or scans, but does not transfer the data. Only one exception:
> I have checked the Backend ID and made a successful (!) test scan in
> Terminal by using: scanimage > test.pnm AND scanimage --format tiff >
> test.tiff
> The fact, that it scanned a tiff file perfectly through Terminal, tells me
> that there should be a way to make it work with a more handy software also,
> right?
> 
> About the set up:
> The scanner is connected to power and through USB to the Mac.
> 
> I checked my scanner in Terminal by
> 
> sane-find-scanner
> scanimage -L
> 
> and got the following results..
> 
> -------------------------------
> 
> sane-find-scanner
> 
>   # sane-find-scanner will now attempt to detect your scanner. If the
>   # result is different from what you expected, first make sure your
>   # scanner is powered up and properly connected to your computer.
> 
>   # No SCSI scanners found. If you expected something different, make sure
> that
>   # you have loaded a kernel SCSI driver for your SCSI adapter.
> 
> found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x0901 [hp
> scanjet scanner], chip=GL646?) at libusb:002:002-03f0-0901-00-00
> found USB scanner (vendor=0x05ac [Apple Inc.], product=0x8215 [Bluetooth
> USB Host Controller]) at libusb:003:003-05ac-8215-ff-01
>   # Your USB scanner was (probably) detected. It may or may not be
> supported by
>   # SANE. Try scanimage -L and read the backend's manpage.
> 
>   # Not checking for parallel port scanners.
> 
>   # Most Scanners connected to the parallel port or other proprietary ports
>   # can't be detected by this program.
> 
>   # You may want to run this program as root to find all devices. Once you
>   # found the scanner devices, be sure to adjust access permissions as
>   # necessary.
> PostProduction:~ mladenvulovic$ scanimage -L
> 
> 
> No scanners were identified. If you were expecting something different,
> check that the scanner is plugged in, turned on and detected by the
> sane-find-scanner tool (if appropriate). Please read the documentation
> which came with this software (README, FAQ, manpages).
> PostProduction:~ mladenvulovic$
> 
> -------------------------------
> 
> As you can see it first recognises the scanner (1st command) and then not
> (2nd command). But yesterday it already confirmed both of these commands
> and still did not work with any scan software.
> I also tried all of the rest suggestions on your faq site
> http://www.ellert.se/twain-sane/faq.html
> Nothing worked.
> Now with Exact Scan it recognised the SANE connection, but once it came to
> starting the scan it just loads without getting anywhere with it.
> 
> Would you please be able to advise me in this case. I expect, I might not
> be the only one with this problem, as this printer (HP 2300c) seems to be
> used by quite a few still.
> I would be glad to hear from you soon.
> 
> Many thanks,
> Nils

	Hello,

	maybe the sanetwain bridge exposes a bug in the backend (or has a bug 
itself) that let you only do previews, and fails at scans. If you can do 
several scans with scanimage with different parameters (width, 
height,resolution, ...) with no problems, we'd have to look into 
sanetwain/genesys backend interaction.

	I have seen some cases where USB power saving could interfere and bring 
intermittent problem like you seem to have. But it was under linux not OS/X. A 
bad cable may cause that kind of problems where the scanner works sometimes 
and then fails. In this case it could be interesting to try to run your 
scanner on another computer with another cable to rule out hardware problems.
 
Regards,
	Stef