Add "Duplex=None" to first line in $HOME/.cups/lpotions has solved the problem for me.
e.g.: Default YOUR_PRINTER Duplex=None
You can also remove this file.
Add "Duplex=None" to first line in $HOME/. cups/lpotions has solved the problem for me.
e.g.: Default YOUR_PRINTER Duplex=None
You can also remove this file.