[sane-devel] Fwd: BENQ 4300 Failed to open device snapscan ; linusb :004:008 error during device I/O

[Oliver Schwartz]

Hi,

it seems that there's a problem with your snapscan.conf file. If 
you're using libusb you *must not* have a device line, i.e. you 
should delete any line stating /dev/usb/scanner0 or similar. The 
backend will automatically probe all USB devices for a suitable 
scanner.

However, in all the logs on pastebin.ca the scanner is correctly 
identified. Most likely you're using the wrong firmware file. For 
your scanner the correct file is u176v***.bin (*** may be any 3-digit 
number, depending on the version of the firmware shipped with the 
scanner).

If this doesn't help please send me a log with SANE_DEBUG_SNAPSCAN=255 
of a scan that results in an error message.

/Oliver

On Monday 26 June 2006 13:39, Mohammed Ahmed wrote:
> Dear  Oliver
>                         I have weird problem with my sane back end
>
> I have suse 10.0 retail edition,  scanimage (sane-backends) 1.0.15;
> backend version 1.0.15
>
>
> i did all the procedure on the HOW to and i still get that error
>
> Failed to open device snapscan ;linusb :004:008 error during device
> I/O
>
> even as root
>
> that is conversation  between me and some one on the #sane channel
>
> http://pastebin.ca/71929
>
> that is the debug out put
> SANE_DEBUG_SNAPSCAN=255
> http://pastebin.ca/71903
>
>
> export SANE_DEBUG_SANEI_USB=255
> http://pastebin.ca/71917
>
>
> we reached a conclusion says that the back end couldn't create usb
> device