[mythtv-users] Failed to change channel error

Harry Devine lifter89 at comcast.net
Tue Dec 28 19:54:04 UTC 2010


On 12/24/2010 02:48 PM, Harry Devine wrote:
> On 12/24/2010 02:16 PM, John P Poet wrote:
>> On Fri, Dec 24, 2010 at 10:04 AM, Harry Devine<lifter89 at comcast.net>  
>> wrote:
>>> I just re-did my capture cards after I upgraded to 0.24 and I 
>>> noticed that
>>> none of my HD-PVR recordings were happening.  So I just setup a test
>>> recording, and captured the following in my myth-backend log:
>>>
>>> 2010-12-24 12:00:02.934 TVRec(1): Changing from None to RecordingOnly
>>> 2010-12-24 12:00:02.938 TVRec(1): HW Tuner: 1->1
>>> 2010-12-24 12:00:03.046 Channel(/dev/video0) Error:
>>> GetCurrentChannelNum(231): Failed to find Channel
>>> 2010-12-24 12:00:03.047 Channel(/dev/video0)::TuneTo(231): Error, 
>>> failed to
>>> find channel.
>>> 2010-12-24 12:00:03.053 AutoExpire: CalcParams(): Max required Free 
>>> Space:
>>> 3.0 GB w/freq: 15 min
>>> 2010-12-24 12:00:03.058 Started recording: "Action News": channel 
>>> 1231 on
>>> cardid 1, sourceid 1
>>> 2010-12-24 12:00:03.062 scheduler: Started recording: "Action News": 
>>> channel
>>> 1231 on cardid 1, sourceid 1
>>> 2010-12-24 12:00:03.081 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.131 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.182 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.233 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.283 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.334 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.384 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.435 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.485 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.536 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.586 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.637 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.687 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.738 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.788 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.839 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.889 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.940 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:03.990 SignalMonitor: channel change failed
>>> 2010-12-24 12:00:04.032 Updating status for "Action News" on cardid 1
>>> (Tuning =>  Recorder Failed)
>>> 2010-12-24 12:00:04.068 Reschedule requested for id 0.
>>> 2010-12-24 12:00:04.096 Scheduled 1 items in 0.0 = 0.00 match + 0.03 
>>> place
>>> 2010-12-24 12:00:04.101 scheduler: Scheduled items: Scheduled 1 
>>> items in 0.0
>>> = 0.00 match + 0.03 place
>>>
>>> I can "cat" my HD-PVR successfully, so I know it works OK.  And I use
>>> firewire to change channels which has always worked (unless something
>>> changed there that I'm not sure of yet).
>>>
>>> Any ideas on what could be happening?
>>
>> Some people have had trouble with the 0.23 to 0.24 upgrade, where the
>> freqid column in the channel database looses it's value somehow.  This
>> can cause the symptoms you are seeing.
>>
>> If you bring up mythweb, check to make sure that for each channel on
>> the HD-PVR, that the "freqid" value matches the "channum" value.  If
>> it doesn't, fix that, and it will probably fix your problem.
>>
>>
>> John
> I just verified that they match.  I tried using the 6200ch program 
> earlier to change channels via firewire and it failed, so I removed 
> the cable and put it back in, and it worked again.  However, I still 
> have the same problem trying to record (same errors I should say).
>
> Has something changed in the mythtv-setup on the 0.24 upgrade that 
> would cause the backend to fail in changing channels?  It seems like 
> this is where the issue is.
>
> I can put up more logs or info if anyone wants to see it.
>
> Thanks,
> Harry
>
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>
Anyone?  Since the channel is on a HDPVR source, is Myth trying to 
change the channel on the HDPVR itself instead of via the Firewire?  I 
tried putting the following into the Input Connections for the channel 
changer script, but it didn't work: "/usr/bin/6200ch %CHANID%".  I can 
run 6200ch manually and it works OK.

Thanks!
Harry



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