cb2 as a mpd client on OpenWRT for playing music, this is an overhead. a TP-Link pocket router is enough.
I don't need 4K, my internet won't provide speed. I was counting on 720p, 1080p. YouTube worked great. The plan was to try nes / snes / sega. Lakka also does not support A20 because the parent project does not.
about hdmi-audio
b1e43da work
5e44eaf work
04373a4 not work
5a56803 not work
looks like i find a reason. but i not familiar with git and i can go wrong directions
if anyone is interested. built some images, reduced the range
71f490b hdmi-audio work
0d15a6f hdmi-audio not work
sad news 
we can bury our cb2 boards.
Old, crap stock android 4.x. Armbian - non official supported. I try Lakka, but it even not boot. LE is the best that i try.
7 years for kernel support - hw decoding and hdmi-audio. No one have time and want to fix code for old chip support.
When and if there is a volunteer, the A10 / A20 will fall further behind technology.
you can try delete .kodi folder. be sure to make a backup
test images A20 9.80-devel
b2ebfdc - hdmi audio don't work
cf93b15 5e00249 c8070d2 67aedc9 70b69eb can't test. All 5 images not run kodi gui. Last log on screen
Reached target Kodi Mediacenter Interface.
kodi.log 0 byte
LibreELEC-A20.arm-9.80-devel-2f50060 hdmi audio work. Cubieboard2
oops. Looks like i test wrong directions...
A20.arm-9.80-devel-c941cec-cubieboard2.img.gz work
A20.arm-9.80-devel-a02a10d-cubieboard2.img.gz not work
test LibreELEC-A20.arm-9.80-devel-4c80f82-cubieboard2 hdmi-audio not work
not too much comment after LibreELEC-A20.arm-9.80-devel-2f50060
I can build only 2 days in 2 weeks. can test 2 weeks.
I can try different images to localize the problem. There is no way to build images
find first broken hdmi-audio test image.
LibreELEC-A20.arm-9.80-devel-20200202081811-2f50060-cubieboard2 hdmi-audio work
LibreELEC-A20.arm-9.80-devel-20200215132138-d1fdc57-cubieboard2 hdmi-audio not work
this is not a very large interval to find out the reason?
this part kodi.log with working hdmi-audio
LibreELEC (community): devel-20200202081811-2f50060 9.80, kernel: Linux ARM 32-bit version 5.4.16
Kodi (19.0-ALPHA1 Git:6e15fcb9ff05ed7463d69083b2fa2fd702f3abd0)
Kodi compiled 2020-01-31 by GCC 9.2.0 for Linux ARM 32-bit version 5.4.16 (328720)
All next test.libreelec.tv images without hdmi-audio for me.
very strange, but since february i have problem with hdmi-audio output. Cubieboard2 nightly images. From the settings available only pcm and bluetooth. last work hdmi-audio for me is selfbuild LibreELEC-A20.arm-9.80-devel-20200202081811-2f50060-cubieboard2.tar
log Ubuntu Pastebin
lines 256 detect sun4i-hdmi but then line 495 list only PCM and bluetooth (i use usb bluetooth dongl)
