No services found - therefore no channels - DVB-T

Duncan Gillibrand

I was running tvheadend on XBMC Eden via Openelec and all was fine.

The system has upgraded to XBMC Frodo 12.1 on Openelec 3.0.0 with tvheadend 3.3.511.

I did some playing to get EPG working and blew up tvheadend somehow.

I stripped out all I could in an effort to start again (set live TV to off, removed the add-on service for tvheadend and add-on for tvheadend PVR and deleted the service add-on data service.multimedia.tvheadend from /.xbmc/userdata/addon_data).

I rebooted then re-installed PVR add-on and service add-on and went into the tvheadend gui and selected add dvb network by location. I am in Ottawa, Canada and of course there is no option so selected us_ATSC_center_frequencies_8VSB which worked previously for me in Eden.

The system scans 68 muxes but never finds a single service.

I tried adding muxes in manually but my version of tvheadend only lets me enter frequency in one box and then the second box is a pulldown for Modulation of QAM-64 or QAM-256 which are cable options. There are no other options.

Help .... please? I am stuck and have tried everything and can only wildly guess that something happened when tvheadend moved to version 3.3.511.

OR I have some corruption somewhere that I need to delete and don't know where. Note that running openelec doesn't allow me to remove, purge and re-add packages.

I notice that some of the adapter options have changed. I have the following set for each adapter (Samsung S5H1411 QAM/8VSB Frontend):

Enabled: Y

Autodetect muxes: Y

Skip initial scan: N

Idle scanning: Y

Close device handle when idle: N

Skip service availability check when mapping: N

Use SID as channel number during mapping: N

Monitor signal quality: Y

Full mux reception: Off

Grace Period: 0

Disable PMT monitoring: N

Original Network ID: 0

Extra priority: 0

w_scan -f a -A 1 -c CA -x shows the following

.
.

803000: 8VSB(time: 02:49)
tune to: 8VSB f=85000 kHz
(time: 02:52) service is running. Channel number: 6:1. Name: 'CIII-HD'
service is running. Channel number: 41:2. Name: 'CIII-SD'
tune to: 8VSB f=189000 kHz
(time: 02:53) service is running. Channel number: 9:1. Name: 'OTTAWA CBOFT-DT'
tune to: 8VSB f=213000 kHz
(time: 02:54) ----------no signal----------
tune to: 8VSB f=213000 kHz (no signal)
(time: 02:55) service is running. Channel number: 13:1. Name: 'CJOH'
tune to: 8VSB f=491000 kHz
(time: 02:56) service is running. Channel number: 65:1. Name: 'Citytv'
tune to: 8VSB f=509000 kHz
(time: 02:57) service is running. Channel number: 14:1. Name: 'OMNI2'
tune to: 8VSB f=521000 kHz
(time: 02:58) service is running. Channel number: 11:1. Name: 'CHCHDT1'
tune to: 8VSB f=551000 kHz
(time: 02:59) service is running. Channel number: 60:1. Name: 'OMNI1'
tune to: 8VSB f=569000 kHz
(time: 03:01) ----------no signal----------
tune to: 8VSB f=569000 kHz (no signal)
(time: 03:02) ----------no signal----------
tune to: 8VSB f=629000 kHz
(time: 03:03) ----------no signal----------
tune to: 8VSB f=629000 kHz (no signal)
(time: 03:04) ----------no signal----------
tune to: 8VSB f=641000 kHz
(time: 03:05) service is running. Channel number: 42:1. Name: 'CTS-HD'
dumping lists (9 services)

Done.

Is there a way to use the data from w_scan and manually edit and populate a config file for tvheadend? Where would that be and what is it called?

G W

I have the same issue using Openelec on my R-pi, Tvheadend 3.3.511 backend, with HDHomeRun as my tuner. I verified that the muxes are good by playing them in VLC, so why no services?

Mark Krautheim

Same here, running OpenELEC 3.0.0 on RPi, with ATI TV Wonder 600 USB tuner (aka 'LG Electronics LGDT3303 VSB/QAM'). This wassorta working a few days ago, except that the bug du jour was the one where 'Map DVB services to channels...' button wasn't functioning (services were created, however). I seem to recall seeing some message whizz by at some point regarding upgrading of Tvheadend just before things went south(er); it's at 3.3.511 now but I don't recall what it was at before.

Like the OP, I've selected 'us_ATSC_center_frequencies_8VSB' as I'm trying to watch OTA stations, but not a single service is created out of the 68 muxes scanned.

Here's a sample log entry for a mux that I think it should be picking up (because itdid a few days ago):

Apr 04 05:07:59.000 dvb: "/dev/dvb/adapter0" tuning to "521,028 kHz" (Autoscan)
Apr 04 05:07:59.185 dvb: /dev/dvb/adapter0 started dvr thread
Apr 04 05:07:59.279 viasat_baltic: install table handlers
Apr 04 05:07:59.279 uk_freesat: install table handlers
Apr 04 05:07:59.279 eit: install table handlers
Apr 04 05:08:01.009 dvb: "521,028 kHz" on adapter "LG Electronics LGDT3303 VSB/QAM Frontend", status changed to Bursty FEC
Apr 04 05:08:11.007 dvb: "521,028 kHz" on adapter "LG Electronics LGDT3303 VSB/QAM Frontend", status changed to OK
Apr 04 05:08:15.845 dvb: /dev/dvb/adapter0 stopping thread
Apr 04 05:08:15.846 dvb: /dev/dvb/adapter0 stopped thread

michele palazzi

Same problem here, Openelec 3.0 running on Zotac Zbox with sundtek usb DVB-C/T tuner card

with a w_scan i find over 100 mux but adding it on tvheadend it's not creating any service

Adam Sutton

Guys,

I've just found a bug in master that might relate, can you try this patch...

http://pastebin.com/raw.php?i=P3agzunm

Adam

G W

Sorry, is this to be entered on the command line? I ssh to my RPi and try the first command, but I get:
-sh: diff: command not found

Adam Sutton

This is to be used against the source for building the package, if you're relying on the OE provided builds I guess you'll have to wait for me to push and them to include.

Adam

Duncan Gillibrand

If you could give me some hints as to how to build the replacement package and install in Openelec then I will give it a go.

I used to work in support BUT that was a lifetime ago and was Pascal based software ..... OK, you can stop laughing now.

When would be the next build and rollout?

Duncan

Nick R

Any update here? I upgraded to OE 3.0 the other day and tried to set up tvheadend for the first time with my HDHomeRun. Like others have described tvheadend can't find any services for any of the muxes I've added. Works fine in VLC.

james scott

Any update to this? I've got the same issue.

G S

I have registered just to update this thread.

I also had this problem and I solved it by adding the missing channels manually with QAM-64 modulation and then manually changing the muxe information in /LOCATION_OF_TVH_INSTALL/dvbmuxes/YOUR_ADAPTER. You can edit the files and change the "Constellation" to 8VSB manually. This worked for me.