TVHeadEnd rejecting login

[livetv]

Well, it was informative until the forum ate it. Got into tvheadend alright, setup passwords, then discovered that the TV tuner was not being detected. It is a Hauppauge WintTV 850. There is no /dev/dvb/ directory, but lsmod turns up a bunch of modules that got loaded, see below. Some of those look relevant. I had this tuner working on my desktop x86 linux box a few months ago, but the tuner is not detected there either now. Thanks for all the help so far, googling has been less than successful.

Code:

cx231xx_dvb             8045  0
dvb_core               81298  3 dvb_usb,lgdt3305,cx231xx_dvb
cx231xx_alsa            5776  0
tda18271               34609  0
hid_logitech            9806  0
tea5767                 5668  0
tuner                  14708  0
cx25840                45519  0
evdev                  11221  5
joydev                  8936  0
cx231xx               134584  2 cx231xx_alsa,cx231xx_dvb
cx2341x                17895  1 cx231xx
videobuf_vmalloc        4525  1 cx231xx
videobuf_core          17243  2 cx231xx,videobuf_vmalloc
i2c_mux                 2496  1 cx231xx
tveeprom               11607  1 cx231xx
v4l2_common             4279  4 cx2341x,cx231xx,cx25840,tuner
videodev              140015  5 cx2341x,cx231xx,cx25840,tuner,v4l2_common
media                  11951  4 cx231xx,cx25840,tuner,videodev