[sane-devel] CanoScan LiDE30 problem

[Gerard Klaver]

On Mon, 2007-12-03 at 11:08 +0100, Johannes Ranke wrote:
> Hi,
> 
> My Canoscan LiDE30 used to work nicely under Debian unstable for more
> than a year. Since about half a year it makes problems: If I scan from a
> frontend like quiteinsane, I can select the device  (I am using libusb),
> and the frontend pretends to scan, but the scanner does nothing, so I
> end up with a black image. The scanner works under Windows. Last week,
> after I tested under Windows, it worked under Linux, too.
> 
>   $ scanimage -L
>   device `v4l:/dev/video0' is a Noname BT878 video (AVerMedia AVerTV D
>   virtual device
>   device `plustek:libusb:003:003' is a Canon CanoScan N1240U/LiDE30
>   flatbed scanner
> 
> I discovered that I can scan from the command line as normal user:
> 
>   $ SANE_DEBUG_PLUSTEK=128 scanimage -d 'plustek:libusb:003:003' \
>       > image.pnm \
>       2> canoscanLiDE30.err
> 
> I am attaching the output of this. Graphical frontends still don't work,
> even when specifying the device on the command line for xscanimage, or 
> selecting it in quiteinsane.
> 
> I also noticed the following dmesg output after trying to scan with
> xscanimage: 
> 
>   usb 3-2: usbfs: interface 0 claimed by usbfs while 'xscanimage' sets
>   config #1
> 
> I don't know which (combination of) software is reponsible for the
> problems, otherwise I would file a bug report in the Debian BTS.
> 
> My kernel is:
>   $ uname -a
>   Linux stiller 2.6.20-1-amd64 #1 SMP Tue Apr 24 21:10:58 UTC 2007
>   x86_64 GNU/Linux
> 
> Sane version is:
> 
>   $ scanimage -V
>   scanimage (sane-backends) 1.0.18-cvs; backend version 1.0.18
> 
> Best regards,
> 
> Johannes

Add a # before the v4l line in /etc/sane.d/dll.conf

this will disable the v4l backend and will prevent that your video
device is selected.
> 
> --------
> m.vr.gr.
> Gerard Klaver