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Printing has always worked fine for me whichever suld driver version I've tried. It's scanning that is the problem. The printer-driver-splix driver is only a printer driver, it doesn't support scanners.

When I install suld-driver-3.00.37-2/samsungmfp-driver-legacy or suld-driver-4.00.35-2, no scanner is found, xsane doesn't start, suld-scanner-usblp-fix doesn't make any difference.

When I install 4.00.39-2, scanimage -L says "device `smfp:SAMSUNG SCX-4x16 Series on USB:0' is a SAMSUNG SCX-4x16 Series on USB:0 Scanner". I however get "Failed to open device 'smfp:SAMSUNG SCX-4x16 Series on USB:0': Error during device I/O." when starting xsane. When I also install suld-scanner-usblp-fix with 4.00.39-2, xsane starts without complaints, but hangs after scanning initializing and head movements - just when it seems like actual scanning is starting, and I get a simple "Error during device I/O" error. sane-find-scanner never reports any scanner.

Are you connecting directly to the computer with the USB, not through hubs ? That's how it works for me (with 3.00.37).

I mean that in the list with drivers shown I scroll down (a lot) and I have a driver named exactly SCX-4216F. This is in Ubuntu Mate 15.10. For me SCX-4x16 does not work - printer starts to print and then it does not finish, not even get the paper from the tray.

That driver is provided by splix, and is not part of the Samsung packages.  So to see it, you would also need to install printer-driver-splix.

Well, it's available on the default installation and the live cd of Ubuntu Mate 15.10...

Just reinstalled Ubuntu Mate and the scanner work just with this:

a) Connect directly to USB computer port, no hubs
b) In terminal:
sudo echo "deb http://www.bchemnet.com/suldr/ debian extra" >> /etc/apt/sources.list
wget -O - http://www.bchemnet.com/suldr/suldr.gpg | sudo apt-key add -
sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get install -y samsungmfp-driver-legacy
sudo apt-get install -y samsungmfp-scanner

And don't forget when you add printer in cups select driver 4216f not 4x16.

I don't understand what you mean with "select driver 4216f not 4x16"? The only choice available in the add printer GUI or the cups web interface is SCX 4x16 for me, and there is just a SCX-4x16.ppd.gz file in /usr/share/cups/model/suld.

In your previous reply I understand it as you just change the display name? ("When selecting driver from database indicate SCX-4216F not SCX-4x16 and name and description replace x with 2 for completness.")

I mean that in the list with drivers shown I scroll down (a lot) and I have a driver named exactly SCX-4216F. This is in Ubuntu Mate 15.10. For me SCX-4x16 does not work - printer starts to print and then it does not finish, not even get the paper from the tray.

Just reinstalled Ubuntu Mate and the scanner work just with this:

a) Connect directly to USB computer port, no hubs
b) In terminal:
sudo echo "deb http://www.bchemnet.com/suldr/ debian extra" >> /etc/apt/sources.list
wget -O - http://www.bchemnet.com/suldr/suldr.gpg | sudo apt-key add -
sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get install -y samsungmfp-driver-legacy
sudo apt-get install -y samsungmfp-scanner

And don't forget when you add printer in cups select driver 4216f not 4x16.

I have managed to make scanning work on Ubuntu Mate 15.10 AMD64 for Samsung SCX-4216F/XEN.

a) Uninstalled all packages from this repository (I was desperate):
sudo apt-get remove -y samsungmfp-scanner samsungmfp-configurator-data samsungmfp-scanner-sane-fix-multiarch samsung-driver-pdf-fix samsungmfp-scanner-usblp-fix
sudo apt-get remove samsung*
sudo apt-get autoremove

b) Printer Settings - > Delete Printer
Add
When selecting driver from database indicate SCX-4216F not SCX-4x16 and name and description replace x with 2 for completness.
Apply

c) I went to http://www.bchemnet.com/suldr/suld.html and downladed version 3.00.37 the original

d) Right click on UnifiedLinuxDriver-3.00.37.tar.gz and extract here

e) In a terminal:
cd Downloads/cdroot/Linux/
sudo apt-get install -y sane sane-utils
sudo sh install.sh

f) Install anyway, Next... and when it lets you select what printer you have click cancel.

g) Connect printer by USB directly to the computer (found in http://www.bchemnet.com/suldr/scanning.html at S3) not through:
-USB hub
-PCMCIA or ExpressCard USB adapter
-monitor USB hub

And now it works. Scanner with xsane and printer.

Conclusion for you, may work just with:
a) Connect directly to USB computer port, no hubs
b) In terminal:
sudo echo "deb http://www.bchemnet.com/suldr/ debian extra" >> /etc/apt/sources.list
wget -O - http://www.bchemnet.com/suldr/suldr.gpg | sudo apt-key add -
sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get install -y samsungmfp-driver-legacy
sudo apt-get install -y samsungmfp-scanner

Good luck ! And oil the rubbers in the upper side of the paper tray and the document paper feeder mechanisms so that they are a little moist and have more friction, don't throw away your cool printer just for paper jams.