All Lexmark Optra PCL, Postscript, and PJL commands are fully documented in freely downloadable technical reference manuals. And they are investigating current free printing software with an eye to providing full support for users. Also Don Wright and Lloyd Young, from the Optra and inkjet divisions, respectively. To date they have provided support for operating a few PCL lasers on SuSE and Red Hat. I am discussing approaches with them now.
Free software can drive both styles fairly well.
A group of middle managers in Okidata is working to promote the idea of free software support to upper managment. All express interest in helping out. Russ Vitale, Tim Deppa Samsung Samsung markets an assortment of printers. I've put a copy of this driver here .