Re: xsane doesn't see USB scanner

* Gerry Gavigan <[email protected]> [08-29-04 12:28]:
> On Sunday 29 August 2004 14:14, Patrick Shanahan wrote:
> 
> > Have you gone to http://www.xsane.org to see if xsane supports your
> > scanner?  XSane is just a graphical user interface for sane and the
> > applications that you cited as not seeing your scanner are all
> > graphical.
> > If your scanner is not supported by xsane, you can still scan from the
> > command line, or there are other scanner gui's available, such as:
> >   vuescan  http://www.hamrick.com/vsm.html
> >
> > What brand/model of scanner do you have?  Have you checked in
> > /etc/scan.d/ for the config file and does it require modification?
> 
> (I know you realise) I was posting to indicate that between upgrades some 
> devices that were working, stop working (it is my experience that they start 
> working again one upgrade later).  

A scientific observation


> The scanner is the canoscan 670u and is auto detected by YaST and assigned the 
> plustek driver.  It successfully acquired a test image during set up.  The 
> scanner used to work through kooka in 9.0.  Until 9.1  I have not needed to 
> touch xsane.  

So you didn't look to see if it was supported, but you say it worked
with 9.0, so it is/was supported.  And you did not check to see if the
config file was correct or even there.


> Currently Yast describes the device as "libusb" 

libusb is a library "that allows userspace access to USB devices", not
a device.  libusb provides access to the device, probably
/dev/usb/scanner0 or /dev/usbscanner

btw, I did not know what libusb was, I looked it up.  Some interest
*is* required.

rpm -q libusb
  will tell you if you have libusb installed

Yast *may* be telling you that libusb *is* required.
  Yast2 -> Install Software -> libusb
will do it.


> However I cannot find that device in /dev/usb to test xsane 
> [plustek:/dev/usb/libusb] [-s] from the command line (so kooka and indeed the 
> gimp are irrelevant at this time) 

http://www.sane-project.org/man/sane-plustek.5.html says (you should
read as it is somewhat long):

To use your scanner with this backend, you need at least two entries in
the configuration file (there are more you might want):
   /usr/local/etc/sane.d/plustek.conf
      [usb] vendor-id product-id
      device /dev/usbscanner
			    
so you should have at least:
   /etc/sane.d/plustek.conf
      usb 0x04a9 0x220d
      /dev/usb/scanner0
  
or 
   /etc/sane.d/canonusb.conf
or
   /etc/sane.d/canon670u.conf

with the same lines, usb... & /dev/usb/scanner0

the /dev/usb/scanner0 line might want to be /dev/usbscanner, you will
need to experiment
   

> The entries dev/usb/ contains are [scanner0] [scanner1] etc.

yes, there is also, /dev/usbscanner


> It reminds me of the printer problem that I couldn't solve when I upgraded 

not related....  and will confuse the issue


> I cannot find libusb anywhere so even if I had confidence in my ability to 
> correctly create a symbolic link, I am not sure that it would be any use.

Why would you want to 'create a symbolic link'?  Use rpm to see if it
is installed and/or look for it with 'locate'.  From what you have
told me here, it seems that it needs to be installed, if it is not.
It will not hurt anything to have it installed anyway, except use a
little disk space, so install it.

-- 
Patrick Shanahan                        Registered Linux User #207535
http://wahoo.no-ip.org                        @ http://counter.li.org
HOG # US1244711           Photo Album:  http://wahoo.no-ip.org/photos