Comment # 2 on bug 1016204 from Martin Schreiber

It could be that FIFO operation in parport_pc causes the data errors. With
"options parport_pc io=0x378,0xd050,0xd030 dma=none,none,none irq=7,18,10" in
"/etc/modprobe.d/99-local.conf" the motherboard port and the two ports on the
PCI card all work OK, "dmesg|grep parport" lists:
"
[   17.250204] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE]
[   17.333784] parport1: PC-style at 0xd050, irq 18 [PCSPP,TRISTATE,EPP]
[   17.416860] parport2: PC-style at 0xd030, irq 10 [PCSPP,TRISTATE,EPP]
[   17.424652] parport2: Printer, Hewlett-Packard HP LaserJet 6P
[  105.840722] lp0: using parport0 (interrupt-driven).
[  105.840745] lp1: using parport1 (interrupt-driven).
[  105.840766] lp2: using parport2 (interrupt-driven).
"
instead of:
"
[   17.229035] parport_pc 00:03: reported by Plug and Play ACPI
[   17.229146] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE]
[   17.312448] parport1: PC-style at 0xd050 (0xd040), irq 18, using FIFO
[PCSPP,TRISTATE,COMPAT,ECP]
[   17.396935] parport2: PC-style at 0xd030 (0xd020), irq 18, using FIFO
[PCSPP,TRISTATE,COMPAT,ECP]
[   17.404834] parport2: Printer, Hewlett-Packard HP LaserJet 6P
[  117.824110] lp0: using parport0 (interrupt-driven).
[  117.824135] lp1: using parport1 (interrupt-driven).
[  117.824156] lp2: using parport2 (interrupt-driven).
" 
with the default settings.
A thread about the experiments is here:
https://forums.opensuse.org/showthread.php/521726-Parallelport-support-broken?p=2804416#post2804416