Hello. I compiled armbian 5.73 with kernel 4.20(bionic dev) and with my patch. I have only sound on output HDMI work perfect. Audio jack not work. aplay -l show me only one device: card 0: allwinnerhdmi [allwinner,hdmi], device 0: 1c22800.i2s-i2s-hifi i2s-hifi-0  +/- I see sometimes that WiFi have problem with signal quality. Maybe it is only problem with signal. I didn't found in dtb (kernel megous) and other patches armbian support for i2s2 and sound_hdmi. My patch. I'm a beginner and i don't know linux kernel well. I wan't to only help us.