On 2020-10-30 20:38, ToddAndMargo via users wrote:
1) connected a USB to Parallel converter card. Printer work fine
2) boot off of Fedora-Xfce-Live-x86_64-33-1.2.iso. Printer
admin still can't find the card.
3) With
# modprobe -r lp
# modprobe -r parport_pc
# modprobe parport_pc io=0x378 irq=11
# modprobe lp
the card does show up and you can print to it, but
the jobs instantly disappear and nothing shows on
the printer's status screen
More tests:
4) tried a different parallel port cable with
and without #3 above. no symptom change
5) tested with a uboobo live usb: xubuntu-20.10-desktop-amd64.iso
with and without #3 above. no symptom change