To get the Lexmark X1270 working under Linux you can use the drivers for the Lexmark Z600. (Only the printer will work, not the scanner) I had some problems to get it working at first, there was some libraries or whatever it was called that was missing so I added 3 files I needed in a archive for you to download.
But before you do that, add these PPA’s to the packet manager:
Inside the archive:
Just unpack it and doubleclick on the files to install them.