[mythtv-users] Live TV tries to tune channel unavailable on that tuner...

[Peter Bennett (cats22)]

On 11/12/2014 04:37 PM, Steven Adeff wrote:
> $ mythbackend --version
> Please attach all output as a file in bug reports.
> MythTV Version : v0.27.4-6-ge0b0027
> MythTV Branch : fixes/0.27
> Network Protocol : 77
> Library API : 0.27.20141016-1
> QT Version : 4.8.1
> Options compiled in:
>  linux profile use_hidesyms using_alsa using_oss using_pulse
> using_pulseoutput using_backend using_bindings_perl
> using_bindings_python using_bindings_php using_crystalhd using_dvb
> using_firewire using_frontend using_hdhomerun using_ceton using_hdpvr
> using_ivtv using_joystick_menu using_libcec using_libcrypto
> using_libdns_sd using_libfftw3 using_libxml2 using_lirc using_mheg
> using_opengl using_opengl_video using_qtwebkit using_qtscript
> using_qtdbus using_sdl using_taglib using_v4l2 using_x11 using_xrandr
> using_xv using_profiletype using_bindings_perl using_bindings_python
> using_bindings_php using_mythtranscode using_opengl using_vaapi
> using_vdpau using_ffmpeg_threads using_mheg using_libass using_libxml2
>
> The system has two HDPVR with a full channel listing available, and an
> QAM HDHR with a limited channel listing available.
> When both HDPVR are in use, and the user attempts to watch LiveTV, the
> system flashes "Please Wait" then goes back to the menu with the
> following in the backend log,
>
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: I
> TVRecEvent tv_rec.cpp:1050 (HandleStateChange) TVRec[7]: Changing from
> None to WatchingLiveTV
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: E
> TVRecEvent channelutil.cpp:1940 (GetChannelData) GetChannelData()
> failed because it could not#012#011#011#011find channel number '52' in
> DB for source '2'.
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: E
> TVRecEvent recorders/channelbase.cpp:221 (IsTunable) ChannelBase[7]:
> IsTunable(MPEG2TS,52) Failed to find channel in DB on input '7'
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: E
> TVRecEvent channelutil.cpp:1940 (GetChannelData) GetChannelData()
> failed because it could not#012#011#011#011find channel number '52' in
> DB for source '2'.
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: E
> TVRecEvent recorders/channelbase.cpp:221 (IsTunable) ChannelBase[7]:
> IsTunable(MPEG2TS,52) Failed to find channel in DB on input '7'
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: E
> TVRecEvent recorders/channelbase.cpp:171 (Init) ChannelBase[7]:
> Setting start channel '52' failed, #012#011#011#011and we failed to
> find any suitible channels on any input.
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: I
> TVRecEvent tv_rec.cpp:3603 (TuningCheckForHWChange) TVRec[7]: HW
> Tuner: 7->7
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: E
> TVRecEvent channelutil.cpp:1940 (GetChannelData) GetChannelData()
> failed because it could not#012#011#011#011find channel number '52' in
> DB for source '2'.
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: E
> TVRecEvent recorders/dtvchannel.cpp:241 (SetChannelByString)
> DTVChan[7](192.168.1.117-0): SetChannelByString(52): Unable to find
> channel in database.
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: E
> TVRecEvent tv_rec.cpp:3793 (TuningFrequency) TVRec[7]: Failed to set
> channel to 52. Reverting to kState_None
> Nov 12 13:28:05 MythCenter mythbackend: mythbackend[2641]: I
> TVRecEvent tv_rec.cpp:1050 (HandleStateChange) TVRec[7]: Changing from
> WatchingLiveTV to None
> Nov 12 13:32:13 MythCenter mythbackend: mythbackend[2641]: N Expire
> autoexpire.cpp:264 (CalcParams) AutoExpire: CalcParams(): Max required
> Free Space: 4.0 GB w/freq: 7 min
>
> When this first happened I changed the startchan number for the tuner
> from 52 to a channel that is in the database for the source connected
> to this tuner, but now it looks to have returned for some reason.
> Is there something I've missed in my setup that is causing this to happen?
>
> thanks!
>
Mythtv keeps the last channel tuned by each frontend for live tv and
when you switch to live tv it tries to tune that channel. Unfortunately
if that channel is not working you are stuck, every time you try again
it hangs there and you cannot change channel.
I have solved this before by running this SQL:

update settings set data = '3707'
where value = 'DefaultChanid' ;

Setting a good known channel (note that is the chanid not the channel
number). This will set all frontends to that default channel. To set a
single frontend you will need to add a hostname to the where clause.

Peter