This bug report actually pertains openSUSE 13.2, I could not find out how to
set the correct version number, sorry.

I try to connect a HP Laserjet 6P with Centronics connection to an Acer Veriton
M4640G on openSUSE 13.2 32bit. The parallel port is provided by a
"
03:00.0 Communication controller: MosChip Semiconductor Technology Ltd. PCI
9815 Multi-I/O Controller (rev 01)
Subsystem: LSI Logic / Symbios Logic 2P0S (2 port parallel adaptor)
Flags: medium devsel, IRQ 18
I/O ports at d050 [size=8]
I/O ports at d040 [size=8]
I/O ports at d030 [size=8]
I/O ports at d020 [size=8]
I/O ports at d010 [size=8]
I/O ports at d000 [size=16]
Kernel modules: parport_pc
"
PCI card.
Yast correctly finds and initializes the printer, printing of some characters
works, longer texts or graphics print garbage.
Exactly the same happens with a HP Laserjet 4MP.

Also the same happens with the same printers on a second computer with 64bit
openSUSE Leap 42.1 and two other different PCI-Express parport cards with
different chips.
The Windows7 64 bit installation on this second computer worked with the same
printers and both PCI-Express cards IIRC.

A third slower computer with the older openSUSE 13.1 32bit worked OK with the
"LSI Logic / Symbios Logic 2P0S" card, other cards not tested, sadly that
computer died. :-(

A timing/handshake problem with faster computers and/or newer kernels maybe?
Upstream report is here:
https://bugzilla.kernel.org/show_bug.cgi?id=190541