[sane-devel] Help needed diagnosing strange failure to scan with Samsung SCX-4500W

Mike Cloaked mike.cloaked at gmail.com
Fri May 10 09:38:54 UTC 2013

On Fri, May 10, 2013 at 9:20 AM, Mike Cloaked <mike.cloaked at gmail.com>wrote:

I made a typo in my last post which I will correct below:

> I am wondering now about udev more than libusb -
> In /lib/udev/rules.d/53-sane.rules
> there is a rule for the scanner:
> # Samsung SCX-4500W
> ATTRS{idVendor}=="04e8", ATTRS{idProduct}=="342b", MODE="0664",
> GROUP="scanner", ENV{libsane_matched}="yes"
> and I amended the rule that I have in /etc/udev/rules.d/70-printers.rules
> # Samsung SCX-4500W
> #ATTRS{idVendor}=="04e8", ATTRS{idProduct}=="342b", MODE="0664",
> GROUP="scanner", ENV{libsane_matched}="yes"

The lines that are active in the 70-printers-rules file are not the above
two but:
# Samsung SCX-4500W printer MFP
ATTR{idVendor}=="04e8", ATTR{idProduct}=="342b", MODE:="0664", GROUP:="lp",

This MFP printer was previously in use up to 6 months ago with both the
printer and scanner functions working without any need to tinker on a
desktop computer running Fedora F16 which was using udev although of course
in the interim both udev as well as the kernels and systemd have been
updated significantly since then, and this is now connected to an arch
linux system.

However I do wonder if there is a way to get the udev rules changed so that
the two functions of this device can work alongside each other.  If this
can be resolved then it may well also lead to a solution for your camera
multifunction problem also.

mike c
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