Samsung SF-560 Series User Manual page 202

Problem
The machine doesn't scan
I can't print when I
installed both Linux
Print Package (LPP) and
MFP driver on the same
machine
simultaneously.
Possible Cause and Solution
• Check if a document is loaded into the machine.
• Check if your machine is connected to the computer.
Make sure if it is connected properly if I/O error is
reported while scanning.
• Check if MFP port is not busy. Since functional
components of MFP (printer and scanner) share the
same I/O interface (MFP port), the situation of
simultaneous access of different "consumer"
application to the same MFP port is possible. To avoid
possible conflicts, only one of them at a time is
allowed to gain control over the device. The other
"consumer" will encounter "device busy" response.
This can usually happen while starting scan procedure,
and appropriate message box will be displayed.
To identify the source of the problem, you should open
MFP ports configuration and select the port assigned
to your scanner. MFP port's symbol /dev/mfp0
corresponds to LP:0 designation displayed in the
scanners' options, /dev/mfp1 relates to LP:1 and so
on. USB ports start at /dev/mfp4, so scanner on
USB:0 relates to /dev/mfp4 respectively and so forth
sequentially. In the Selected port pane you can see if
the port is occupied by some other application. If this
is the case, you should wait for completion of the
current job or should press Release port button, if you
are sure that the present port's owner is not
functioning properly .
• Since both Linux Printer Package and MFP driver make
a symbolic link to "lpr" printing command, which is
commonly used on Unix clones, it is not recommended
to use both package on the same machine.
• If you still want to use both packages simultaneously,
please install the LPP first.
• If you want to uninstall only one of them, please
uninstall both packages and install that one you want
to use again.
• If you don't want to uninstall MFP driver and install it
again, you may make the necessary symbolic link
yourself. Please, log in as root user and invoke the
following command:
ln -sf /usr/local/bin/samsung/slpr /usr/bin/lpr
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