[sane-devel] Problems with sane and USB

[cl at isbd.net]

On Tue, Nov 07, 2006 at 08:24:33AM +0900, Olaf Meeuwissen wrote:
> cl at isbd.net writes:
> 
> > On Mon, Nov 06, 2006 at 09:19:38AM +0000, cl at isbd.net wrote:
> >> On Sat, Nov 04, 2006 at 07:12:39PM -0500, m. allan noah wrote:
> >> > On Sat, 4 Nov 2006 cl at isbd.net wrote:
> > [snip]
> >> > >
> >> > >If I run "scanimage -L" as root it says "No scanners were identified".
> >> > >
> >> > >If I run "xsane" or "xscanimage" as root they find both my scanners.
> >> > 
> >> > the fact that scanimage does not work, but xsane does, generally means 
> >> > that you have two copies of sane-backends installed, often the distro's 
> >> > original one, and one in /usr/local
> >> > 
> >> Ah, thanks, it's possible that I do have two copies of sane installed,
> >> I'll investigate.
> >> 
> > It's not that I have two copies of sane installed, it's the various
> > "add-ons" that have screwed things up.  It would appear that both the
> > HPLIP/CUPS installation and the iscan installation have assumed a base
> > directory of /usr/local whereas the basic sane installation is in
> > /usr.
> 
> The iscan RPMs use /usr (and are not relocatable).  If you compiled
> from source, the ./configure script is GNU standards compliant and
> uses /usr/local as the default prefix.  A look at:
> 
>   $ ./configure --help
> 
> would have told you that.  You can easily recompile for /usr with
> 
>   # ./configure --prefix=/usr
> 
Yes, that's exactly what I have done (after uninstalling the
/usr/local version of iscan) and, as I have already reported here, it
has fixed all of my problems.

It's just unfortunate that my Slackware package install of sane put
it in /usr and the iscan install went to /usr/local by default.
Normally one *can* install 'non standard' packages (i.e. stuff that's
not part of the Slackware distribution) in /usr/local without
problems.  Iscan is an exception and needs to be in the same place as
the rest of sane.


-- 
Chris Green (chris at halon.org.uk)