[mythtv-users] dtvsignal shows strong - but mythbackend can't tune HD3000

john roberts homepagez at lycos.com
Thu Mar 3 22:39:54 UTC 2005


Can someone help?  I've got a buddy who is setting up his HD3000 card in his mythbackend.  The backend doesn't seem to be able to tune correctly or something.  Since the backend is unable to tune - LiveTV goes blank and then returns to the main screen.

BTW - I'm also able to capture ATSC content using getatsc and then play it with mplayer without a problem.


dtvsignal shows a strong signal:

htpc mythgame # /usr/local/bin/pcHDTV/dtvsignal /dev/dtv0 39
main: argc 3 argv[1] /dev/dtv0
channel 39
freq*16 = 9940
main: ioctl 1 rtn 0
main: ioctl 2 rtn 0
dtvsignal ver 0.1 - by Jack Kelliher (c) 2002
channel = 39 freq*16 = 9940
 30db       0%         25%         50%         75%        100%
Signal:     |     .     :     .     |     ._____:_____._____|
Signal: 089 $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
htpc mythgame # 


But the backend - shows:


htpc mythgame # mythbackend --verbose channel
2005-03-03 17:35:20.963 New DB connection, total: 1
Starting up as the master server.
2005-03-03 17:35:20.972 New DB connection, total: 2
2005-03-03 17:35:20.976 Channel(/dev/dtv0):SetFormat(): Probed input: 0, name = Television
2005-03-03 17:35:20.976 Channel(/dev/dtv0):SetFormat(): Probed input: 1, name = Composite1
2005-03-03 17:35:20.976 Channel(/dev/dtv0):SetFormat(): Probed input: 2, name = S-Video
2005-03-03 17:35:20.977 Channel(/dev/dtv0)::SwitchToInput(in 0)
2005-03-03 17:35:20.977 Channel(/dev/dtv0)::SwitchToInput() setting video mode to ATSC
2005-03-03 17:35:20.978 Channel(/dev/dtv0)::SwitchToInput(in 0): Error -1 while setting video mode (v2), "Invalid argument", trying v4l v1
2005-03-03 17:35:20.978 Channel(/dev/dtv0)::SwitchToInput() setting video mode to ATSC
2005-03-03 17:35:20.978 Channel(/dev/dtv0)::SwitchToInput(in 0): Setting video mode with v4l version 1 worked
2005-03-03 17:35:20.979 Channel(/dev/dtv0):SetFormat(): Probed input: 0, name = Television
2005-03-03 17:35:20.979 Channel(/dev/dtv0):SetFormat(): Probed input: 1, name = Composite1
2005-03-03 17:35:20.979 Channel(/dev/dtv0):SetFormat(): Probed input: 2, name = S-Video
2005-03-03 17:35:20.980 New DB connection, total: 3
2005-03-03 17:35:20.984 Channel(/dev/dtv0)::TuneTo(39-1): curList[38].freq(313250)
2005-03-03 17:35:20.984 Channel(/dev/dtv0)::TuneToFrequency(5012)
2005-03-03 17:35:20.988 Channel(/dev/dtv0)::CheckSignal(5000, 65, 0): usingv4l2(1)
2005-03-03 17:35:21.045 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:21.603 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:22.161 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:22.719 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:23.277 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:23.834 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:24.392 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:24.950 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:25.508 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:26.066 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:26.624 Channel(7)::signalStrengthATSC_v4l2(): signal strength: 22
2005-03-03 17:35:26.624 Channel(/dev/dtv0)::CheckSignal(): Maximum signal strength detected: 22% after 5500 msec wait

Setup:

- P4 HT 3.2G
- Gentoo
- 2.6.9 kernel
- MythTV CVS from 3/3/05
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