Tvheadend

This issue is observed in Openelec5.0 where new Tvheadend addon (4.3.7) was introduced some days ago. This addon contains Tvheadend 3.9.2413. The previous addon was based on 3.9.2182. The described fault is not present there.

Hardware: AM1H-ITX, 5150, Tevii s471 PCIe DVB-S2 tuner card with a 4/1 diseqc switch.

Symptom:
- New addon works fine after the upgrade. Seems stable and fast.
- When I stop the TV reception, it cannon be started again ever. After selecting any channel the "HTS Tvheadend: disconnected" message appears. Meanwhile the TVH GUI is not accessible or extremly slow.

Recovery:
Practically nothing. Neither the restart of the addon nor the restart of the complete PC solves the problem (except rare cases) The error message re-appears again as soon as I start to tune any channel.
The only recovery is to roll-back to the old addon.
After downgrade to 3.9.2182 then upgrade to 3.9.2413, the system works again until stopping the reception or restart the system.

Logs:
This log was collected after system restart with "linuxdvb" trace and debug switched on. The log stopped at the fault happened.

2015-01-26 17:15:21.711 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - checking FE status (ready)
2015-01-26 17:15:21.711 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - status 4 (0000)
2015-01-26 17:15:21.761 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - checking FE status (ready)
2015-01-26 17:15:21.762 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - status 4 (0000)
2015-01-26 17:15:21.812 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - checking FE status (ready)
2015-01-26 17:15:21.813 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - status 4 (0000)
2015-01-26 17:15:21.863 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - checking FE status (ready)
2015-01-26 17:15:21.863 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - status 4 (0000)
2015-01-26 17:15:21.913 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - checking FE status (ready)
2015-01-26 17:15:21.914 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - status 4 (0000)
2015-01-26 17:15:21.964 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - checking FE status (ready)
2015-01-26 17:15:21.965 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - status 4 (0000)
2015-01-26 17:15:22.000 [ INFO]:mpegts: 11778V in Astra 19.2E - scan no data, failed
2015-01-26 17:15:22.000 [ INFO]:subscription: 000A: "scan" unsubscribing
2015-01-26 17:15:22.000 [ DEBUG]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - stopping 11778V in Astra 19.2E
2015-01-26 17:15:23.000 [ INFO]:mpegts: 11778V in Astra 19.2E - tuning on Montage Technology DS3000 : DVB-S #0
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: tuner Montage Technology DS3000 : DVB-S #0 tunning to DVBS pos 19.2E freq 11778000 V sym 27500000 fec 3/4 mod QPSK roff 35 (freq 1178000)
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 17 => 5
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 03 => 1178000
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 06 => 2
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 08 => 27500000
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 09 => 3
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 12 => 2
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 04 => 0
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 13 => 0
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 01 => 0
2015-01-26 17:15:23.000 [ DEBUG]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - starting 11778V in Astra 19.2E
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: Montage Technology DS3000 : DVB-S #0 - tuning
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: tuner Montage Technology DS3000 : DVB-S #0 tunning to DVBS pos 19.2E freq 11778000 V sym 27500000 fec 3/4 mod QPSK roff 35 (freq 1178000)
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 17 => 5
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 03 => 1178000
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 06 => 2
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 08 => 27500000
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 09 => 3
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 12 => 2
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 04 => 0
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 13 => 0
2015-01-26 17:15:23.000 [ TRACE]:linuxdvb: S2CMD 01 => 0

The following log from Kodi shows that Tvheadend got unresponsive at subscribing to a channel. (Before that the Channel and EPG infomration was successfully transferred.)

13:17:42 T:139891698554624 DEBUG: PVRManager - OpenLiveStream - opening live stream on channel 'Discovery HD Showcase'
13:17:42 T:139891698554624 DEBUG: opening live stream for channel 'Discovery HD Showcase'
13:17:42 T:139891698554624 INFO: AddOnLog: Tvheadend HTSP Client: SendSubscribe - subscribe to channel '1349997740', subscription 1
13:17:43 T:139891698554624 ERROR: AddOnLog: Tvheadend HTSP Client: ReadResult - 'subscribe to channel' failed - request timed out after 1 seconds
13:17:43 T:139891698554624 ERROR: AddOnLog: Tvheadend HTSP Client: SendSubscribe - failed to subscribe to channel 1349997740, consider the connection dropped
13:17:43 T:139891698554624 DEBUG: AddOnLog: Tvheadend HTSP Client: reconnect triggered
13:17:43 T:139891698554624 ERROR: CDVDPlayer::OpenInputStream - error opening [pvr://channels/tv/Minden csatorna/12.pvr]
13:17:43 T:139891698554624 NOTICE: CDVDPlayer::OnExit()
13:17:43 T:139891698554624 DEBUG: CDVDInputStreamPVRManager::Close - stream closed
13:17:43 T:139891698554624 DEBUG: OnPlayBackStopped: play state was 1, starting 1
13:17:43 T:139891698554624 DEBUG: Thread DVDPlayer 139891698554624 terminating
13:17:43 T:139891681769216 ERROR: AddOnLog: Tvheadend HTSP Client: connection dropped, trying to restore
13:17:43 T:139891681769216 ERROR: AddOnLog: Tvheadend HTSP Client: ReadMessage - not connected
13:17:43 T:139894163797888 DEBUG: OnPlayBackStopped: play state was 3, starting 0
13:17:43 T:139894163797888 DEBUG: CAnnouncementManager - Announcement: OnStop from xbmc
13:17:43 T:139894163797888 DEBUG: GOT ANNOUNCEMENT, type: 1, from xbmc, message OnStop
13:17:43 T:139893158164224 NOTICE: PVRManager - StartPlayback - started playback on channel 'Discovery HD Showcase'
13:17:43 T:139891698554624 DEBUG: POParser: loaded 15 strings from file /usr/share/kodi/addons/pvr.hts/resources/language/Hungarian/strings.po
13:17:43 T:139891698554624 DEBUG: POParser: loaded 0 strings from file /usr/share/kodi/addons/pvr.hts/resources/language/English/strings.po
13:17:43 T:139891698554624 DEBUG: CAddonCallbacksAddon - QueueNotification - Tvheadend HTSP Client - Error Message : ''HTS Tvheadend': Kapcsolat bontva'
13:17:43 T:139891698554624 DEBUG: AddOnLog: Tvheadend HTSP Client: OpenSocket - connecting to '127.0.0.1', port '9982'
13:17:43 T:139891698554624 DEBUG: AddOnLog: Tvheadend HTSP Client: OpenSocket - connected to '127.0.0.1', port '9982'
13:17:45 T:139891698554624 ERROR: AddOnLog: Tvheadend HTSP Client: CHTSPConnection - SendGreeting - failed get a reply after the greeting
13:17:45 T:139891698554624 ERROR: AddOnLog: Tvheadend HTSP Client: Connect - failed to read greeting from the backend
13:17:45 T:139891698554624 DEBUG: AddOnLog: Tvheadend HTSP Client: OpenSocket - connecting to '127.0.0.1', port '9982'
13:17:45 T:139891698554624 DEBUG: AddOnLog: Tvheadend HTSP Client: OpenSocket - connected to '127.0.0.1', port '9982'
13:17:47 T:139894163797888 DEBUG: ------ Window Deinit (DialogKaiToast.xml) ------
13:17:47 T:139891698554624 ERROR: AddOnLog: Tvheadend HTSP Client: CHTSPConnection - SendGreeting - failed get a reply after the greeting
13:17:47 T:139891698554624 ERROR: AddOnLog: Tvheadend HTSP Client: Connect - failed to read greeting from the backend
No connection anymore...

Complete logs are attached. (Sorry, the different logs were collected at different time, but the fault was the same)

Hint: