dmesg showed my Toshiba Satellite A50's parallel port was in ECP. However, BIOS only has two options: ECP and Standard Bi-Directional. Neither setting allowed my printers to be detected.
-- cupsys does not automatically detect parallel printer https://launchpad.net/bugs/29050 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs