irrelative, your QinHeng CH340S USB->Parallel adapter has an actual hardware/firmware bug which is probably the reason why we had to add a quirk rule to the USB backend of CUPS. See also bug 1156210, especially comment #2.
irrelative, your QinHeng CH340S USB->Parallel adapter has an actual hardware/firmware bug which is probably the reason why we had to add a quirk rule to the USB backend of CUPS. See also bug 1156210, especially comment #2.