http://www.linuxprinting.org/printing-faq.html#q_6_1
Says, here that sometimes the port can't be detected unless the Plug and Play Bios feature is turned off.
Hi all,
I installed Knoppix on a Compaq Persario 5660 with two HD's and 128Mg of mem. It has a 400MHz processor. It work really great an I really like the OS.
However, here is the problem. When I try to add my HP Desk Jet 810C to the OS the CUPs program does not see or recognize my parallel port. The configuration program see's the USB ports which the 810 cannot use, but not my parallel port.
I do not have this problem with BLAG (Fedora 1) Linux or Win2K. The parallel port is recognized with BLAG Linux and the printing works well.
I have apt-get paraport and all the latest HP recommended drivers to no avail. I have unistalled and reinstalled all apps that deal with the printer. I also have the latest and greatest updated CUP's version. I still cannot get the add new printer class config program to recognize the parallel port. Does anyone have a cure or answer to this problem? I am at wit's end and have run out of ideas to correct this problem.
Any help would be appreciated.
Thank you,
Paul
http://www.linuxprinting.org/printing-faq.html#q_6_1
Says, here that sometimes the port can't be detected unless the Plug and Play Bios feature is turned off.
Sorry, don't have any particular help but I recently installed my HP deskjet 810C on the current Mepis 2004.03 (which is based on knoppix) and it works fine using cups. I have also exported the printer via samba and can print to it from my windows pc. I didn't have to fiddle with any BIOS settings.

TP-Link TL-SG105 5-Port Gigabit Ethernet Unmanaged Metal Desktop Network Switch
$19.99
NETGEAR GS308EP Essential Series 8-Port Gigabit PoE+ Unmanaged Switch
$49.99
Cisco Catalyst 2960-48TT-L 48-Port Fast Ethernet Managed Rackmount Switch
$46.99
Linksys LGS328MPC 24-Port Managed Gigabit PoE+ Switch with 4 10G SFP+ Uplinks
$224.95
10-Port Gigabit PoE Network Switch with 8 PoE+ Ports with 2 Combo SFP Slots 125W
$39.99
5 Port Gigabit Unmanaged Ethernet Switch, Home Network Hub, Office Ethernet S...
$9.64
TP-Link TL-SG2210P 10-Port Gigabit Smart Switch w/ 8-Port PoE+ NO AC SKU 25597
$36.98
Arista DCS-7010T-48-R 48P 1GbE 4P 10GbE SFP+ RA Switch with rack mounts
$69.00
NETGEAR 5-Port Gigabit Ethernet Unmanaged Switch (Gs305) - Desktop Quiet Fanless
$25.99
Cisco WS-C3650-12X48UR-L 48-Port Stackable Layer 3 8x10G SFP+ Port Switch
$129.99