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Ticket #11427: LiveTV/Recording doesn't work with CBand LNBs from 0.25 onwards
#11427: LiveTV/Recording doesn't work with CBand LNBs from 0.25 onwards
-------------------------------------+-------------------------------------
Reporter: nick.marshall@… | Type: Bug Report -
Status: new | General
Milestone: unknown | Priority: minor
Version: 0.26-fixes | Component: MythTV - General
Keywords: cband, livetv, | Severity: medium
fail,myth | Ticket locked: 0
-------------------------------------+-------------------------------------
When using mythtv 0.25 or 0.26 if you follow through all of the steps in
setting it up with a ku band LNB myth will work fine and all epg data will
be populated.
Works fine for mythtv 0.25/0.26.

If you do the same thing with a cband lnb it will locate the channels and
add them to the database as expected but when trying to watch tv or record
tv it will be unable to.


Recording and watching tv from a cband lnb does work in 0.24 however.

The issue is nearly identical to the one here: http://www.mentby.com/dg-
mailing-list/

Cards tested on:
hauppage nova-s plus, hauppage nexus-s


OS used:
Mythbuntu 12.04,
Centos 6.3

Issue also occurs on multiple different lnbs and satellites. Signal
strength (90-99%)

mythbackend -v siparser,eit,channel produces this:


{{{
2013-02-27 12:02:32.300751 I DVBChan(1:/dev/dvb/adapter0/frontend0):
Opening DVB channel
2013-02-27 12:02:32.307593 I ChannelBase(2): Input #2: 'DVBInput'
schan(401) sourceid(1) ccid(2)
2013-02-27 12:02:32.307647 I ChannelBase(2): Current Input #2: 'DVBInput'
2013-02-27 12:02:32.309835 I DTVChan(/dev/dvb/adapter0/frontend0):
SetChannelByString(401):
2013-02-27 12:02:32.316999 I DTVChan(/dev/dvb/adapter0/frontend0):
SetChannelByString(401): failure
2013-02-27 12:02:32.317066 I ChannelBase(2): Looking for startchannel
'401' on input 'DVBInput'
2013-02-27 12:02:32.324487 I ChannelBase(2): Found startchannel '401' on
input 'DVBInput'
2013-02-27 12:02:32.337698 I Found 0 distinct programid authorities

}}}

and when it tries to get EIT data

{{{
2013-02-27 12:03:35.314224 I EITScanner (1): StartActiveScan called with
1 multiplexes
2013-02-27 12:03:35.599338 I TVRec(1): SetChannel(401) -- begin
2013-02-27 12:03:35.601670 I DVBChan(1:/dev/dvb/adapter0/frontend0):
Opening DVB channel
2013-02-27 12:03:35.601731 I DTVChan(/dev/dvb/adapter0/frontend0):
SetChannelByString(401):
2013-02-27 12:03:35.609460 I DTVChan(/dev/dvb/adapter0/frontend0):
SetChannelByString(401): failure
2013-02-27 12:03:35.609520 E TVRec(1): Failed to set channel to 401.
Reverting to kState_None
2013-02-27 12:03:35.610040 I TVRec(1): SetChannel(401) -- end
2013-02-27 12:03:35.610086 I EITScanner (1): Now looking for EIT data on
multiplex of channel 401
}}}

And the frontend when trying to watch tv:

{{{
2013-02-27 12:06:04.507525 N TV: Spawning LiveTV Recorder -- begin
2013-02-27 12:06:04.561636 N TV: Spawning LiveTV Recorder -- end
2013-02-27 12:06:04.564137 E GetEntryAt(-1) failed.
2013-02-27 12:06:04.564199 E It appears that your backend may be
misconfigured. Check your backend logs to determine whether your capture
cards, lineups, channels, or storage configuration are reporting errors.
This issue is commonly caused by failing to complete all setup steps
properly. You may wish to review the documentation for mythtv-setup.
2013-02-27 12:06:04.581668 E EntryToProgram(0@Thu Jan 1 12:00:00 1970)
failed to get pginfo
2013-02-27 12:06:04.581755 E TV: HandleStateChange(): LiveTV not
successfully started
2013-02-27 12:06:04.584038 E TV: LiveTV not successfully started
2013-02-27 12:06:04.637334 I TV: Main UI disabled.

}}}

Backend from the same time:

{{{
2013-02-27 12:06:04.513256 I [2073/2083] TVRecEvent tv_rec.cpp:1030
(HandleStateChange) - TVRec(1): Changing from None to WatchingLiveTV
2013-02-27 12:06:04.539601 I [2073/2083] TVRecEvent tv_rec.cpp:3503
(TuningCheckForHWChange) - TVRec(1): HW Tuner: 1->1
2013-02-27 12:06:04.557845 E [2073/2083] TVRecEvent tv_rec.cpp:3689
(TuningFrequency) - TVRec(1): Failed to set channel to 401. Reverting to
kState_None
2013-02-27 12:06:04.557977 I [2073/2083] TVRecEvent tv_rec.cpp:1030
(HandleStateChange) - TVRec(1): Changing from WatchingLiveTV to None
2013-02-27 12:08:34.658128 E [2073/2083] TVRecEvent tv_rec.cpp:3689
(TuningFrequency) - TVRec(1): Failed to set channel to 401. Reverting to
kState_None
}}}


Looks like the frontend failures are due to not being able to tune to the
channel after running the mythtv-setup.

note- all of this works fine for 0.24 just the newer versions don't work.

Also in New Zealand if that's any use.

--
Ticket URL: <http://code.mythtv.org/trac/ticket/11427>
MythTV <http://code.mythtv.org/trac>
MythTV Media Center
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Re: Ticket #11427: LiveTV/Recording doesn't work with CBand LNBs from 0.25 onwards [ In reply to ]
#11427: LiveTV/Recording doesn't work with CBand LNBs from 0.25 onwards
--------------------------------------+----------------------------
Reporter: nick.marshall@… | Owner:
Type: Bug Report - General | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - General | Version: 0.26-fixes
Severity: medium | Resolution:
Keywords: cband, livetv, fail,myth | Ticket locked: 0
--------------------------------------+----------------------------

Comment (by r.w.grimmett@…):

I have the same issue with C band LNBs.
Version 0.24 works fine, tvheadend works fine also.
MythTV 0.25 and 0.26 work perfectly with my Ku band LNB's .

The only difference that I can see between Ku and C band is that Ku is a
much higher frequency.

I wonder if some how the frequency table that is being made with mythtv
setup or the method of reading the frequency when you request a channel is
the problem when trying to get a lock on a C band transponder ?

I wonder are there any tools that can be used to watch what the dvb-s
cards are actually doing ?

i.e log the frequency that was requested of the card ?

I am in Australia and there are a lot of people with english as a 2nd
language here with C band dishes who could potentially be mythtv users if
this bug was resolved.

A MythTV system is so much better than the cheap and nasty Sat receivers
that are typically used for satellite.

--
Ticket URL: <http://code.mythtv.org/trac/ticket/11427#comment:1>
MythTV <http://www.mythtv.org>
MythTV Media Center
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Re: Ticket #11427: LiveTV/Recording doesn't work with CBand LNBs from 0.25 onwards [ In reply to ]
#11427: LiveTV/Recording doesn't work with CBand LNBs from 0.25 onwards
--------------------------------------+----------------------------
Reporter: nick.marshall@… | Owner:
Type: Bug Report - General | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - General | Version: 0.26-fixes
Severity: medium | Resolution:
Keywords: cband, livetv, fail,myth | Ticket locked: 0
--------------------------------------+----------------------------

Comment (by t.dobes@…):

I'm seeing this problem as well -- exact same symptoms - tested MythTV
0.25, 0.26, and 0.27. Tested both Debian Jessie and MythBuntu 14.04.1.
My old Debian Squeeze install with MythTV 0.24 continues to work fine with
the exact same hardware.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/11427#comment:2>
MythTV <http://www.mythtv.org>
MythTV Media Center
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Re: Ticket #11427: LiveTV/Recording doesn't work with CBand LNBs from 0.25 onwards [ In reply to ]
#11427: LiveTV/Recording doesn't work with CBand LNBs from 0.25 onwards
--------------------------------------+----------------------------
Reporter: nick.marshall@… | Owner: (none)
Type: Bug Report - General | Status: closed
Priority: minor | Milestone: unknown
Component: MythTV - General | Version: 0.26-fixes
Severity: medium | Resolution: Abandoned
Keywords: cband, livetv, fail,myth | Ticket locked: 0
--------------------------------------+----------------------------
Changes (by Stuart Auchterlonie):

* status: new => closed
* resolution: => Abandoned


Comment:

Closing out old tickets.

--
Ticket URL: <https://code.mythtv.org/trac/ticket/11427#comment:3>
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