Parallel port not working [12,04]

Parallel port not working [12,04]

I'm working on setting up an old printer (HP LaserJet 6P) on some old
hardware (Gateway E4300) running Precise (12.04 LTS). When I try to select
the parallel port in hp-setup -i, it gives me the following error:
$ sudo hp-setup -i
--------------------------------
| SELECT CONNECTION (I/O) TYPE |
--------------------------------
Num Connection Description
Type
-------- ----------
----------------------------------------------------------
0* usb Universal Serial Bus (USB)
1 net Network/Ethernet/Wireless (direct connection or
JetDirect)
2 par Parallel Port (LPT:)
Enter number 0...2 for connection type (q=quit, enter=usb*) ? 2
Using connection type: par
error: No device selected/specified or that supports this functionality.
Things I've checked so far:
1) The printer is plugged in and connected.
2) The printer is turned on.
3) The parallel port is enabled in the BIOS.
4) The parallel port mode is not set in the BIOS (no option to do so).
5) The parallel port modules are loaded. Output of lsmod, trimmed to
relevant bits:
wdmartin@woot:~$ lsmod
Module Size Used by
ppdev 12850 0
lp 17456 0
parport 40931 3 ppdev,parport_pc,lp
parport_pc 32115 1
6) /dev/lp0 and /dev/parport0 exist:
$ ls -hal /dev/lp0 /dev/parport0
crw-rw---- 1 root lp 6, 0 Aug 15 11:58 /dev/lp0
crw-rw---- 1 root lp 99, 0 Aug 15 11:58 /dev/parport0
7) My user is a member of the lp and lpadmin groups:
$ groups
wdmartin adm lp cdrom sudo dip plugdev lpadmin sambashare
8) dmesg shows the parallel port driver loaded:
[ 17.206314] parport_pc 00:08: reported by Plug and Play ACPI
[ 17.206349] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE,EPP]
[ 17.317279] lp0: using parport0 (interrupt-driven).
[ 17.527946] ppdev: user-space parallel port driver
9) lspci does not show the parallel port:
$ lspci
00:00.0 Host bridge: Intel Corporation 82915G/P/GV/GL/PL/910GL Memory
Controller Hub (rev 04)
00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL
Integrated Graphics Controller (rev 04)
00:02.1 Display controller: Intel Corporation 82915G Integrated Graphics
Controller (rev 04)
00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) High Definition Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
PCI Express Port 3 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
PCI Express Port 4 (rev 03)
00:1d.0 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #1 (rev 03)
00:1d.1 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #2 (rev 03)
00:1d.2 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #3 (rev 03)
00:1d.3 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #4 (rev 03)
00:1d.7 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB2 EHCI Controller (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d3)
00:1f.0 ISA bridge: Intel Corporation 82801FB/FR (ICH6/ICH6R) LPC
Interface Bridge (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) IDE Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA
Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus
Controller (rev 03)
02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8050 PCI-E
ASF Gigabit Ethernet Controller (rev 17)
05:05.0 FireWire (IEEE 1394): LSI Corporation FW322/323 (rev 61)
Why doesn't the parallel port show up in lspci? Does that mean the
parallel port is not working, despite everything else looking good?
I've tried configuring the printer via CUPS rather than using hp-setup,
and it appeared to accept the settings, and take a print job, but no
actual printing occurred.
Any suggestions would be welcome.