Hello, from the dmesg messages, I see that no IRQ is assigned to your parallel port. It might be worth passing parameter to the parallel port module in /etc/modules.conf to have it used: options parport_pc io=0x378 irq=7 dma=none Also, running the umax_pp tool with a trace level of 32 (-t 32) will give some hints on what modes are detected. Regards, Stef