[sane-devel] Need help with Canon scanner
alan at his.com
Wed Aug 19 20:13:03 UTC 2015
First of all, thanks for your post, with the helpful hints. I
can narrow my questions; see below.
On Thu, Aug 20, 2015 at 01:38:37AM +0900, Gernot Hassenpflug wrote:
. . . .
> > found USB scanner (vendor=0x04a9, product=0x2774) at libusb:001:004
I can't find where the above line tells _exactly_ what
Canon backend is the appropriate one. I think the above
tells me what the Canon backend should be, and also tells
me the USB port.
> What version of SANE do you have installed? You can look at the package
> libsane, e.g.
> aptitude show libsane
> (on my Debian unstable installation it is 1.0.24-13, although I also
> install the latest development version in /usr/local)
The above call to aptitude tells me that I have
> The MF4700 series has been in SANE since before December 2013, so unless
> you are using an ancient version of SANE, it is most likely that you have
> the backend you need in SANE.
I believe I do. I remember seeing, back in April, that MF4770n
> The documentation in README.linux that comes with the SANE code should help
> you check the installation and do some debugging, or at least specify to
> the list which steps you managed to succeed in, and where things failed.
Thank you very much for this tip. From README.linux, I learned:
"The device files used by libusb are located in /proc/bus/usb/
. . .or in /dev/bus/usb/". For me, they are in
/dev/bus/usb/, which means, I guess, that I am running udev.
I also put the line USB_DEVFS_PATH=/dev/bus/usb into
my .bashrc. But the call to scanimage >image.pnm still
fails. My USB socket lights blink furiously, eventually
the call returns with no SANE devices found and
I am left with an empty file, image.pnm, which I then delete.
> /usr/share/doc/libsane/README.Debian.gz (a Debian-specific file with a
> trouble-shooting section)
This didn't help me.
I think I must be close<g>. But even though I know that
the scanner is seen, and I know the ports in /dev/bus/usb,
I can't get scanimage to work. I hope for further suggestions.
Alan McConnell : http://globaltap.com/~alan/
If you don't know your rights, you don't have any.
If it can't be abused, it's not freedom.
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