Unfortunately the 2.6.31 kernel that shipped with Ubuntu 9.10 has corrupted firmware for this card, and this will unfortunately result in you banging your head repeatedly against whatever hard surface is handy in an attempt to get it working. Thankfully, a solution is at hand.
As detailed by Douglas Mackay in this first reply here, a quick firmware download and install will solve the issue nicely, and result in you being able to utilise your card properly!
Douglas Mackay says:
The firmware version supplied with 9.04 doesn't work for me either (Mythbuntu 9.04 AMD64). However reverting to previous firmware works.
9.04 firmware: dvb-fe-cx24116.fw - MD5 Checksum 9950fe612d47217e6068f7141de225b0 doesn't work
Firmware installed using :-
unzip -jo 88x_2_119_25023_WHQL.zip Driver88/hcw88bda.sys
dd if=hcw88bda.sys of=/lib/firmware/dvb-fe-cx24116.fw skip=81768 bs=1 count=32522
MD5 Checksum 417cafd3b10e207e1dba9a03ad63e405 does work
This is using a Nova HD S2 card (detected as Hauppauge WinTV-HVR4000(Lite) DVB-S/S2 [card=69,autodetected], frontend(s): 1)
I then had some issues getting Myth to properly scan the channels using this card, so on the offchance anyone in the UK would like the scan settings I eventually got to work, drop me a comment and i'll find out.