Here is what Linuxprinting has to say about the LX300+
They consider it a paper weight. They are usually correct. So unless you are up to writing a print driver, it may be time to consider another printer. If you have to print under linux, ( who doesn't ) be sure to look at Linuxprintig.org for printers known to work, before you buy one.
I recently bought a Brother laser ( black and white ) Brother supplied a driver, works as advertised. Less than $200 at Staples.