[SOLVED] - Raspberry Pi - no audio

[rpmoomin]

hello, I am trying to use rpi 3b+ built in sound
os release : 19.07.3

lsmod shows driver is loaded :
snd_bcm2835,snd_rawmidi,snd_seq_device,snd_pcm_oss,snd_pcm,snd_timer,snd_mixer_oss,snd_hwdep,snd_compress
soundcore

there is no /dev/snd and mixer in the dev tree
kernel cmd line
snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_headphones=1

I am testing via headphone and can not get audio out.
what is missing? pls help

[rpmoomin]

I resolved it by checking a working RPI with raspbian installed
had to add audio to /boot/config.txt and reboot
eg
dtparam=audio=on

this solved the issue.