[sane-devel] CanoScan LiDE30 problem

[Johannes Ranke]

Hi Gerhard and Gerard,
(replying to Gerard because I didn't receive Gerhards mail since I am
not on the list)

Thanks for the suggestion with CONFIG_USB_SUSPEND! I just booted a
self-compiled kernel without this option, and scanning works again from
the graphical frontends. What I don't understand is why it works from
the command line with scanimage, but not with the graphical frontends.

Regards,

Johannes

* Gerard Klaver <gerard at gkall.hobby.nl> [071203 18:30]:
> 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
>