Tvheadend

After upgrading to 3.4 I'm getting 0% signal strength and 'No Signal' and/or 'Bad Signal' statuses for known working muxes (either DVB-S or DVB-S2 muxes).

System is Debian Wheezy, vanilla kernel 3.8.4, card is a TBS6920 (FW version 1.26.90.0) This setup works without any issue with tvheadend 3.2.34.

Below is a tvheadend 3.4 log with fresh start configuration.

root@mc:~# tvheadend -d -C -c tvheadend
Apr 09 04:24:42.307 [ DEBUG]:config: no configuration, loading defaults
Apr 09 04:24:42.307 [WARNING]:access: Created default wide open access controle entry
Apr 09 04:24:42.321 [ INFO]:charset: 71 entries loaded
Apr 09 04:24:42.321 [ INFO]:dvb: Found adapter /dev/dvb/adapter0 (Conexant CX24116/CX24118) via PCI
Apr 09 04:24:42.322 [ INFO]:webui: Running web interface in debug mode
Apr 09 04:24:42.322 [ INFO]:CSA: Using SSE2 128bit parallel descrambling
Apr 09 04:24:42.322 [ INFO]:epggrab: module eit created
Apr 09 04:24:42.322 [ INFO]:epggrab: module uk_freesat created
Apr 09 04:24:42.322 [ INFO]:epggrab: module uk_freeview created
Apr 09 04:24:42.322 [ INFO]:epggrab: module viasat_baltic created
Apr 09 04:24:42.323 [ DEBUG]:opentv: dictionary skyit loaded
Apr 09 04:24:42.323 [ DEBUG]:opentv: dictionary skyeng loaded
Apr 09 04:24:42.323 [ DEBUG]:opentv: dictonaries loaded
Apr 09 04:24:42.323 [ DEBUG]:opentv: genre map skyuk loaded
Apr 09 04:24:42.323 [ DEBUG]:opentv: genre maps loaded
Apr 09 04:24:42.323 [ INFO]:epggrab: module opentv-ausat created
Apr 09 04:24:42.323 [ DEBUG]:opentv: provider ausat loaded
Apr 09 04:24:42.323 [ INFO]:epggrab: module opentv-skyuk created
Apr 09 04:24:42.323 [ DEBUG]:opentv: provider skyuk loaded
Apr 09 04:24:42.323 [ INFO]:epggrab: module opentv-skyit created
Apr 09 04:24:42.323 [ DEBUG]:opentv: provider skyit loaded
Apr 09 04:24:42.323 [ DEBUG]:opentv: providers loaded
Apr 09 04:24:42.324 [ INFO]:epggrab: module pyepg created
Apr 09 04:24:42.324 [ INFO]:epggrab: module xmltv created
Apr 09 04:24:42.325 [ DEBUG]:epggrab: using internal grab search
Apr 09 04:24:42.326 [ DEBUG]:epgdb: database does not exist
Apr 09 04:24:42.326 [ INFO]:dvr: Creating new configuration ''
Apr 09 04:24:42.326 [WARNING]:dvr: Output directory for video recording is not yet configured for DVR configuration "". Defaulting to to "/root". This can be changed from the web user interface.
Apr 09 04:24:42.326 [ NOTICE]:START: HTS Tvheadend version started, running as PID:4449 UID:0 GID:0, settings located in 'tvheadend'
Apr 09 04:24:42.330 [ DEBUG]:AVAHI: Adding service 'Tvheadend'
Apr 09 04:24:43.087 [ INFO]:AVAHI: Service 'Tvheadend' successfully established.
Apr 09 04:25:19.061 [ NOTICE]:dvb: Adapter "Conexant CX24116/CX24118" Enabled
Apr 09 04:25:20.064 [ INFO]:dvb: Adapter /dev/dvb/adapter0 will run in full mux mode
Apr 09 04:25:40.939 [ DEBUG]:dvb: /dev/dvb/adapter0 opened frontend /dev/dvb/adapter0/frontend0
Apr 09 04:25:41.697 [ DEBUG]:dvb: "/dev/dvb/adapter0" tuning via s2api to "10,974,000 kHz Horizontal (Default (Port 0, Universal LNB))" (1224000, 29892000 Baud, AUTO, SYS_DVBS, QPSK) for Initial autoscan
Apr 09 04:25:45.003 [ DEBUG]:dvb: "10,974,000 kHz Horizontal (Default (Port 0, Unive" on adapter "Conexant CX24116/CX24118", status changed to No signal
Apr 09 04:25:47.025 [ DEBUG]:dvb: "10,974,000 kHz Horizontal (Default (Port 0, Unive" on adapter "Conexant CX24116/CX24118", status changed to Bad signal
Apr 09 04:25:48.036 [ DEBUG]:dvb: "10,974,000 kHz Horizontal (Default (Port 0, Unive" on adapter "Conexant CX24116/CX24118", status changed to No signal
Apr 09 04:26:20.653 [ DEBUG]:dvb: "/dev/dvb/adapter0" tuning via s2api to "10,974,000 kHz Horizontal (Default (Port 0, Universal LNB))" (1224000, 29892000 Baud, AUTO, SYS_DVBS, QPSK) for Autoscan
Apr 09 04:26:24.009 [ DEBUG]:dvb: "10,974,000 kHz Horizontal (Default (Port 0, Unive" on adapter "Conexant CX24116/CX24118", status changed to Bad signal
Apr 09 04:26:25.020 [ DEBUG]:dvb: "10,974,000 kHz Horizontal (Default (Port 0, Unive" on adapter "Conexant CX24116/CX24118", status changed to No signal
Apr 09 04:27:00.621 [ DEBUG]:dvb: "/dev/dvb/adapter0" tuning via s2api to "10,974,000 kHz Horizontal (Default (Port 0, Universal LNB))" (1224000, 29892000 Baud, AUTO, SYS_DVBS, QPSK) for Autoscan
Apr 09 04:27:04.039 [ DEBUG]:dvb: "10,974,000 kHz Horizontal (Default (Port 0, Unive" on adapter "Conexant CX24116/CX24118", status changed to Bad signal
Apr 09 04:27:05.050 [ DEBUG]:dvb: "10,974,000 kHz Horizontal (Default (Port 0, Unive" on adapter "Conexant CX24116/CX24118", status changed to No signal
Apr 09 04:27:14.049 [ DEBUG]:dvb: "10,974,000 kHz Horizontal (Default (Port 0, Unive" on adapter "Conexant CX24116/CX24118", status changed to Bad signal
Apr 09 04:27:15.010 [ DEBUG]:dvb: "10,974,000 kHz Horizontal (Default (Port 0, Unive" on adapter "Conexant CX24116/CX24118", status changed to No signal

Any ideas?