[sane-devel] Support for CanoScan 9000F and others: 48 bit flatbed scan

[llarevo at gmx.net]

> > In xsane one finds for greyscale and line art 75 dpi available. Scanning
> > with 75dpi-lineart as normal user gives the error message "operation
> > canceled", while it works as root.
> 
> Why do you need root rights? Copy sane-backends/tools/udev/libsane.rules
> to /etc/udev/rules.d/, join group 'scanner' and login again. Then xsane,
> scanimage & co. should run without root rights.

I copied the libsane.rules and belong to the group scanner. Therefore
usually I don't need root rights. But I retest a non working
functionality always again with root privileges.

> The backend only provides the supported resolutions (CS9000F):
> - normal flatbed:  75 ... 4800 dpi
> - 48 bit flatbed: 150 ... 4800 dpi
> - TPU:            300 ... 9600 dpi

On my Fedora 17, 75 dpi flatbed lineart does only work with root
privileges, while all other scan modes (including 75 dpi flatbed grey
and color) work without root-privileges. Cf. pixma.log and
pixma.root.log, each containing the xsane start and one 75 dpi lineart
scan attempt as user (pixma.log) and as root (pixma.root.log).

Regards
--
Felix
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