Thanks farslayer and Xian.
I've tried 5 drivers: Gutenprint v5.0.0 and simplified, and three Foomatic: ljet4, hpijs and 4dith
Also removed and reinstalled printer with kcontrol.
The functions below are beyond my knowledge. I did do the restart, though, in a SU shell. It went OK
$ su
# modprobe lp
# modrpobe parport_pc
# modprobe parport
# /etc/init.d/cups restart
My CUPS 631 (localhost, or
http://127.0.0.1:631) print jobs history shows all "test" jobs completed. But nothing printed.
I'll try again tomorrow. Thanks again.