[sane-devel] jo-kraus at gmx.de sent you a file through WeSendit!

Stef stef.dev at free.fr
Wed Mar 18 19:48:35 UTC 2015

On 18/03/2015 17:10, Jochen wrote:
> Hi Stef,
> thanks for the quick reaction. I guess I managed to compile and install
> the update. The scanner is being recognized (I was at that point
> before). Here is the output of
> scanimage -L
> device 'genesys:libusb:001:003' is a Canon LiDE 120 flatbed scanner
> and
> 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=0x04a9 [Canon], product=0x190e [CanoScan],
> chip=GL848+) at libusb:001:003
>    # 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.
> Unfortunately, it doesn't scan. When I start a scan or a preview, the
> scanner makes a brief noise - but no visible move - and the light inside
> starts blinking. To avoid the question: The scanner is unlocked ;)
> I noticed you pick up my files at about 8:30pm and you write your
> replies around 7am (my time UTC+1), so I propose that a bit after 9pm
> I'll drop you a mail and we try to make a little online debug session.
> How does that sound?
> Alternatively, I suppose there is something to log now in Linux (Ubuntu
> 12.04) and send to you if you tell me what you need and how to produce it.
> Regards,
> Jochen

     this why I promised myself not to work on scanner I can't 
physically work with: taking log, testing and debugging needs that same 
lengthy mails. Much more efforts than doing the actual work if I had the 

      Nevertheless, when comparing the log you sent me, I saw they ware 
different because they had different settings. So comparing them won't 
help finding the differences for sure. For that, we need scans done in 
the very same way.
      The programs shipped with the scanner usually hide things in fancy 
ways, and we cannot be sure of what scan is really done at hardware 
level. The best log should be done with the WIA scanner driver. It is 
ran by right-clicking on scanner icon in the peripherals panel, then 
click on preview once you start USBpcap.

     I hoped that the delta between the LiDE 110 and 120 was the same 
than between the 210 and 220. It seems it is not the case.

     Have you tried to enable debug log like explained in the 
sane-genesys man page ? Are there any interesting error message ?

     Do you remember the settings for the scan you logged ? I could do 
the same, if done with the WIA driver.


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