Docked laptop loses parallel port (Gusty - Not a hardware failure)

Dell D800 laptop.
Clean CD Gusty 7.10 release installed
***Unsure if this has been problem in past as only tested parallel port with this printer under XP Pro OS. Did not try it under Feisty, either.
Checked BIOS to find current setting is for "Normal". Have tried different settings like ECP, etc. No change.

While undocked a parallel printer can be configured and used as expected.
Once docked the port does not seem to exist.

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:~$ ls /dev/l*
/dev/log /dev/loop0
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~$ lsmod | grep lp
lp 12580 0
parport 37448 3 ppdev,lp,parport_pc
===
(Removed ip addresses. Replaced with x's below.)
$ lpinfo -l -v
Device: uri = socket
        class = network
        info = AppSocket/HP JetDirect
        make-and-model = Unknown
        device-id =
Device: uri = beh
        class = network
        info = Backend Error Handler
        make-and-model = Unknown
        device-id =
Device: uri = hpfax
        class = direct
        info = HP Fax (HPLIP)
        make-and-model = Unknown
        device-id =
Device: uri = socket://xxx.xxx.xxx.xxx
        class = network
        info = HP LaserJet 2200 xxx.xxx.xxx.xxx
        make-and-model = HP LaserJet 2200
        device-id =
Device: uri = socket://xxx.xxx.xxx.xxx
        class = network
        info = HP LaserJet 4000 Series xxx.xxx.xxx.xxx
        make-and-model = HP LaserJet 4000 Series
        device-id =
Device: uri = socket://xxx.xxx.xxx.xxx
        class = network
        info = hp LaserJet 4300 xxx.xxx.xxx.xxx
        make-and-model = hp LaserJet 4300
        device-id =
Device: uri = socket://xxx.xxx.xxx.xxx
        class = network
        info = HP LaserJet 5000 Series xxx.xxx.xxx.xxx
        make-and-model = HP LaserJet 5000 Series
        device-id =
Device: uri = socket://xxx.xxx.xxx.xxx
        class = network
        info = HP LaserJet 5000 Series xxx.xxx.xxx.xxx
        make-and-model = HP LaserJet 5000 Series
        device-id =
Device: uri = hp
        class = direct
        info = HP Printer (HPLIP)
        make-and-model = Unknown
        device-id =
Device: uri = http
        class = network
        info = Internet Printing Protocol (http)
        make-and-model = Unknown
        device-id =
Device: uri = ipp
        class = network
        info = Internet Printing Protocol (ipp)
        make-and-model = Unknown
        device-id =
Device: uri = lpd
        class = network
        info = LPD/LPR Host or Printer
        make-and-model = Unknown
        device-id =
Device: uri = cups-pdf:/
        class = file
        info = Print into PDF file
        make-and-model = Generic PDF file generator
        device-id = MFG:Generic;MDL:PDF file generator;DES:Generic PDF file generator;CLS:PRINTER;CMD:POSTSCRIPT;
Device: uri = scsi
        class = direct
        info = SCSI Printer
        make-and-model = Unknown
        device-id =
Device: uri = smb
        class = network
        info = Windows Printer via SAMBA
        make-and-model = Unknown
        device-id =
Device: uri = socket://xxx.xxx.xxx.xxx
        class = network
        info = Xerox WorkCentre 5030 128.183.81.98
        make-and-model = Xerox WorkCentre 5030
        device-id =
Device: uri = socket://xxx.xxx.xxx.xxx
        class = network
        info = Xerox WorkCentre 5030 128.183.81.250
        make-and-model = Xerox WorkCentre 5030
        device-id =
===