[mythtv-users] Ideas to diagnose one faulty DVB-T adapter (on a dual adapter USB stick)

[Dan Gravell]

I first set up my MythTV backend a few months ago. I got it all working with one WinTV Duet stick. Both adapters were working at this stage; I could record two channels at once.

Now I've come back to it and it seems like the first adapter does not work. I guess Myth defaults to the first as I cannot get a lock in Live TV and recordings all fail.

Any ideas to diagnose why one of the tuners on my WinTV Duet works and the other doesn't? Scanning the second adapter brings back channels, e.g:

sudo scan /usr/share/dvb/dvb-t/uk-CrystalPalace -a 1 -o zap

But scanning the first finds nothing but gives lots of 'WARNING: filter timeout pid 0x0000' messages:

gravelld at bordeaux:~$ sudo scan /usr/share/dvb/dvb-t/uk-CrystalPalace -o zap
scanning /usr/share/dvb/dvb-t/uk-CrystalPalace

using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
initial transponder 506000000 0 3 9 3 1 0 0
initial transponder 482000000 0 3 9 3 1 0 0
initial transponder 490000000 0 2 9 3 1 0 0
initial transponder 514000000 0 2 9 3 1 0 0
initial transponder 529833000 0 3 9 3 1 0 0
>>> tune to: 506000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: filter timeout pid 0x0011
WARNING: filter timeout pid 0x0000
WARNING: filter timeout pid 0x0010
>>> tune to: 482000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
WARNING: filter timeout pid 0x0011
WARNING: filter timeout pid 0x0000
WARNING: filter timeout pid 0x0010
>>> tune to: 490000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE
[and so on...]

Dan