[sane-devel] sane-find-scanner works but scanimage does not find a scanner

[Oliver Schwartz]

Hi,

> the directory /usr/lib/sane had contained lots of links to 1.0.5 
> files.  but the 1.0.5 files did not exists,  since the 1.0.7 files did 
> exist, i removed the invalid symbolic links and replaced them with 
> valid 1.0.7 links.

Normally the Redhat package manager should take care of this unless you
compile SANE yourself. Did you upgrade from an earlier Redhat distribution? Did
you compile sane yourself at one point?

Run "scanimage --version" and compare the backend and frontend version. If
they don't match there's still a problem with your installation. In this case
I recommend to 
- uninstall sane
- manually delete /usr/lib/sane, /etc/sane.d, /usr/local/etc/sane.d and
/usr/local/lib/sane
- reinstall sane

> [snapscan] add_device: error opening device /dev/usb/scanner0:
> Invalid argument

Do you have write permissions on /dev/usb/scanner0? Maybe you have to change
the access rights on the device node or add your user to a specific group to
access the scanner. Otherwise you can only access the scanner as root. 

> when i try to run xsane, xsane cannot
> figure out if the scanner is warming up, or disconnected.

You should get an immediate error message if the scanner is disconnected. If
the scanner is warming up xsane will continue after about 15 seconds.
Everything else is a bug.

Regards,

Oliver

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