I've recently installed Tvheadend (HTS 4.3) on a Synology NAS (DS213j running DSM 6.2.3-25426 Update 2). It's getting its signal from an HDHomeRun Duo tuned to UK Freeview channels (from Crystal Palace, London). I'm accessing live channels mainly from Kodi installations from various devices. I can also access all the various components from a web browser on the LAN. Generally I'm really pleased with the features and design of the whole setup and I've successfully recorded and played back a few programs. But I'm tearing my remaining hair out over some niggling problems, and the loss of guide data is the worst. I don't see much discussion about this so I think I must be doing something wrong - I wonder if anyone can help please?
If I go toTvheadend > Channel/EPG > EPG Grabber and click "Trigger OTA EPG Grabber" and then go to "Electronic Programme Guide" I gradually see the guide fill up with about 21,000 entries. Almost every channel has a "Title" and "Extra Text" for every timeslot for the next week. In the HDHomeRun interface I see both tuners connect (to different frequencies) while this is happening. In the Kodi interface if I go to TV > Guide I see the expected coloured grid of programmes with titles and descriptions.
For some reason I don't see listings for any of the HD channels but that's not a showstopper - I worked around it by mapping the corresponding SD channels to their HD counterparts.
I've had no success using the "UK Freeview" EPG source but that's a different issue.
But here's the problem -if I come back a few hours later, most (but not all) of the programme information has disappeared! The grid is still there showing programme durations, but it's just grey with hardly any titles or descriptions. Something is deleting the guide information. I have been unable to work out what, or find any setting that might control it (by trial and error or by googling). I've spent hours on this.
As far as I can tell, there's nothing wrong with the TV signal or the HDHomeRun device. A TV set connected to the same aerial happily shows all programme information including HD channels. The HDHomeRun app always shows the current programme information correctly on any channel.
Also as far as I can tell, the Kodi display always accurately mimics the guide information from Tvheadend (I've tried viewing from Kodi on a Windows PC, an Android phone and an Amazon Firestick).
So it seems to be something to do with the Synology environment. The NAS is also storing backups and video from a surveillance camera, but playback of a recorded HD TV program was pretty flawless, which was a pleasant surprise. Does anyone have any idea what might be causing this "bit rot" and what to do about it? I'm happy to post any requested logs if necessary.