I would guess here by the looks of it.
https://github.com/CoreELEC/CoreELEC/tree/linux-4.9/
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Found it. Thereās a setting in Settings / PVR & Live TV / Power Saving called āBackend Idle Timeā. Switching this off means itāll always wake up to record.
It is working. Needs more testing:
https://test.coreelec.org/ray/CoreELEC-Amlogic.arm-9.0-devel-1555074085.tar
It includes cduās recent cs cd autoswitch.
This testbuild has a true 4K GUI (not scaled) as it was and default in 3.14.
There is a bug that cd only switches if attr is cleared one time (can be done in autostart.sh)
echo āā > /sys/class/amhdmitx/amhdmitx0/attr
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So is it working now?
Ok time for the AVR update.
AC3 5.1 (DD) is picked up correctly
DTS 5.1 is picked up correctly
5.1 channel DD+ is picked up correctly
7.1 channel DD+ is picked up correctly
5.1 TrueHD is picked up correctly
7.1 TrueHD is picked up correctly
5.1 DTS-HD MA is picked up correctly
7.1 DTS-HD MA is picked up correctly
DTSX is picked up as 7.1 DTS-HD MA (my AVR doesnāt support DTSX)
Atmos is picked up as 7.1 TrueHD, again not supported by my AVR
DTS-HD HRA is not detected at all, but also not supported by my AVR.
PCM can be simulated in the GUI if I recall correctly.
Enable stereo upmix
Pick number of channels
2.0 is normal
2.1-5.1 AVR remains in stereo mode, all GUI sounds sound like they are running at 50% pitch and speed
7.0 and 7.1
All audio is lost, AVR detects no audio channels
LPCM 7.1 has issue as above
Films with AAC also have issue as above
So to summarise, all bitstreaming is working perfectly for the formats my AVR supports.
Issue is with anything PCM (Kodi GUI, LPCM and AAC) which is generated by the device.
Selecting any channel value above 2.0 results in audio issues.
Edit
Looks like the multichannel pcm had been a thorn in amlogic for a while. Though looks like some progress has been made on the vero-4k.
Edit2 - add device and setup
Odroid N2 > Pioneer VSX922 > LG 4k TV
In new devel version name from 12th april:
CoreELEC-Amlogic-ng.arm-9.0-devel-1555076659.tar
what does ng stand for?
Next Generation
It landed there by mistake.
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Got mine up and running. Did some audio passthrough tests.
N2 ā> Denon X1400h ā> 1080p Sony
Dolby THD/Atmos works
DTS-X works
No single DD+ works (Incl Netflix), but the one from AMZN. This one passthrough perfectly.
Does dd+ work with gui set to 4k? For me it works at 1080p but not 4k.
I just instaled itā¦, and donāt see it any more 
DD+ / e-ac3 not working on my Yamaha RX-A3030 avr (hdmi).
Logfiles : https://mega.nz/#!28kjCKDR!_nlcKFIq07SAdWXHbbwMI0Qx_8iAK5FHYGxybWmmris
Sample video : https://mega.nz/#!aglF1IzA!rGm2OEUEDcewXfyydNtY0hExU1mdbDAb5Pe0Lix4yGE
First test 5.1 pass through : No sound at all
Second test 5.1 w/o pass through : Stuttering sound, random channel
Third test 2.0 w/o pass through : Normal sound but stereo of course.
The same file works fine on an Odroid C2.
Well I see that the audio stuff is gonna bring us some work sigh
@Sholander no harm if you did. We want to rename the project to Amlogic-ng.
I canāt test that, my AVR cant pass 4k
Yes itās waking up perfectly.
This is great. Iām happy that you could setup the device how you intended it when you bought it!
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DD+ doesnāt work for me with GUI at 1080p
Superb for the switch ! THX
Guys, if you have issues with audio passthrough, you MUST provide us with some more information than just saying āX doesnāt workā, otherwise we canāt do anything about your bug report and it will most likely end up being ignored.
- Tell us what brand and model your AVR is
- State how is the N2 connected to your AVR and TV
- If you have a S905*/S912 device, try the same files with that device and CoreELEC to confirm that itās an issue specifically with our N2 builds.
@TheCoolest
Dd+ doesnāt work on 4k resolution. It works fine at 1080p.
Yamaha RxV781
N2>Yamaha> Hisense 4k tv
Works fine on S912.
All other audio formats work fine except multichannel PCM.
Iām using a Logitech 5.1 Z906
N2 is connected to a Samsung TV and the Logitech is connected to the TV via toslink. I donāt have S905/S912. I do have S812 and that works with LE. Iāve tried passthrough and that does work either. Seems only DD+ 6 channel doesnāt work.