[mythtv-users] New Mythbuntu 9.04 Install, Nova-T 500 not tuning

[GyroTech]

I'm just trying to install MythBuntu 9.04 (so that's kernel 2.6.28 and 
MythTV 0.21) on my shiny new MSI Media Live with a Nova-T 500 in there. 
I've been following a guide I found 
(http://parker1.co.uk/mythtv_ubuntu.php).
The system seems to have picked up both the tuners properly:

# grep -i dvb /var/log/messages
Jun  4 21:15:09 mythtv-lounge kernel: [   10.729900] dvb-usb: found a 
'Hauppauge Nova-T 500 Dual DVB-T' in warm state.
Jun  4 21:15:09 mythtv-lounge kernel: [   10.729944] dvb-usb: will pass 
the complete MPEG2 transport stream to the software demuxer.
Jun  4 21:15:09 mythtv-lounge kernel: [   10.730221] DVB: registering 
new adapter (Hauppauge Nova-T 500 Dual DVB-T)
Jun  4 21:15:09 mythtv-lounge kernel: [   10.847209] DVB: registering 
adapter 0 frontend 0 (DiBcom 3000MC/P)...
Jun  4 21:15:09 mythtv-lounge kernel: [   11.467809] dvb-usb: will pass 
the complete MPEG2 transport stream to the software demuxer.
Jun  4 21:15:09 mythtv-lounge kernel: [   11.468095] DVB: registering 
new adapter (Hauppauge Nova-T 500 Dual DVB-T)
Jun  4 21:15:09 mythtv-lounge kernel: [   11.473943] DVB: registering 
adapter 1 frontend 0 (DiBcom 3000MC/P)...
Jun  4 21:15:09 mythtv-lounge kernel: [   12.026190] input: IR-receiver 
inside an USB DVB receiver as 
/devices/pci0000:00/0000:00:10.0/0000:04:06.2/usb2/2-1/input/input7
Jun  4 21:15:09 mythtv-lounge kernel: [   12.028842] dvb-usb: schedule 
remote query interval to 50 msecs.
Jun  4 21:15:09 mythtv-lounge kernel: [   12.028846] dvb-usb: Hauppauge 
Nova-T 500 Dual DVB-T successfully initialized and connected.
Jun  4 21:15:09 mythtv-lounge kernel: [   12.029060] usbcore: registered 
new interface driver dvb_usb_dib0700

but trying to scan any of my local transmitters (as discovered at 
http://www.dtg.org.uk/industry/coverage.html to be Crystal Palace > 
Sandy Heath > Luton) just results in either turning failure or timeout 
like this:

# scan /usr/share/dvb/dvb-t/uk-CrystalPalace > /root/.tzap/channels.conf
scanning /usr/share/dvb/dvb-t/uk-CrystalPalace
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
initial transponder 505833000 0 3 9 1 0 0 0
initial transponder 481833000 0 2 9 3 0 0 0
initial transponder 561833000 0 2 9 3 0 0 0
initial transponder 529833000 0 3 9 1 0 0 0
initial transponder 578167000 0 3 9 1 0 0 0
initial transponder 537833000 0 3 9 1 0 0 0
 >>> tune to: 
505833000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: filter timeout pid 0x0011
WARNING: filter timeout pid 0x0000
WARNING: filter timeout pid 0x0010
<<cut repeat of above>>
dumping lists (0 services)
Done.

or like this:

# scan /usr/share/dvb/dvb-t/uk-SandyHeath > /root/.tzap/channels.conf
scanning /usr/share/dvb/dvb-t/uk-SandyHeath
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
initial transponder 641833000 0 3 9 1 0 0 0
initial transponder 665833000 0 2 9 3 0 0 0
initial transponder 650167000 0 2 9 3 0 0 0
initial transponder 842000000 0 3 9 1 0 0 0
initial transponder 626167000 0 3 9 1 0 0 0
initial transponder 674167000 0 3 9 1 0 0 0
 >>> tune to: 
641833000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: >>> tuning failed!!!
 >>> tune to: 
641833000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE 
(tuning failed)
WARNING: >>> tuning failed!!!
<<cut repeat of above>>
dumping lists (0 services)
Done.

though there wasn't a transponder file for the Luton transmitter so I 
couldn't test that.

I know the tuner works because this box previously had Mythbuntu 8.04 on 
and (mostly) working before it had to be requisitioned for something 
else for a bit. Plus I'm also watching freeview on the main TV directly 
so I am getting a signal.

Anyone have any ideas for me?? Many thanks...