i have been able to use the hp550 driver with redhat 6.2, mandrake 7.1, and open linux 2.4, but i can't get potato to print. i'm sure there's a config tool i'm missing or not aware of. i did compile with serial parport support. in my kernel log, i the printer shows up as hp 840 (which is right) but i still can't print. HHHHEEEEEELLLLLLPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!