In Alsamixer its missing the master volume.

In older legacy images it was there and driver seemed to be a tinker rockchip driver? Any idea how to enable the master volume slider?

If I increase volume in USB sound card (headphones) then no sound comes out at HDMI and only way to restore is to purge deb of pulseaudio and alsa and re-install.
There are some errors also the moment i log into cli if I do above.

If reproduced ill post here (update). Similar error posted on another topic/board

 

If i test `aplay /usr/share/sounds/alsa/Front_Center.wav`

its ok. After any change to alsamixer nothing comes out

The errors that started after changing alsamixer volume as per above are:

Quote

From: dmesg | grep hdmi
[   25.942319] hdmi-audio-codec hdmi-audio-codec.2.auto: Only one simultaneous stream supported!
[   25.957097] hdmi-audio-codec hdmi-audio-codec.2.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -22
[   25.983838] hdmi-audio-codec hdmi-audio-codec.2.auto: Only one simultaneous stream supported!
[   25.997931] hdmi-audio-codec hdmi-audio-codec.2.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -22
[   26.025064] hdmi-audio-codec hdmi-audio-codec.2.auto: Only one simultaneous stream supported!
[   26.045361] hdmi-audio-codec hdmi-audio-codec.2.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -22
[   26.072715] hdmi-audio-codec hdmi-audio-codec.2.auto: Only one simultaneous stream supported!
[   26.086661] hdmi-audio-codec hdmi-audio-codec.2.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -22

 

And similar error on RockPro64, 

Armbian lsb_release -sd: Ubuntu 20.04.4 LTS
 

Quote

$ dmesg | grep hdmi
[    0.432728] platform ff940000.hdmi: Fixing up cyclic dependency with ff8f0000.vop
[    0.433031] platform ff940000.hdmi: Fixing up cyclic dependency with ff900000.vop
[    3.620071] dwhdmi-rockchip ff940000.hdmi: Detected HDMI TX controller v2.11a with HDCP (DWC HDMI 2.0 TX PHY)
[    3.623691] rockchip-drm display-subsystem: bound ff940000.hdmi (ops dw_hdmi_rockchip_ops)
[   55.392265] hdmi-audio-codec hdmi-audio-codec.5.auto: Only one simultaneous stream supported!
[   55.393344] hdmi-audio-codec hdmi-audio-codec.5.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -22
[   55.395450] hdmi-audio-codec hdmi-audio-codec.5.auto: Only one simultaneous stream supported!
[   55.396332] hdmi-audio-codec hdmi-audio-codec.5.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -22
[   55.399744] hdmi-audio-codec hdmi-audio-codec.5.auto: Only one simultaneous stream supported!
[   55.400655] hdmi-audio-codec hdmi-audio-codec.5.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -22
[   55.403022] hdmi-audio-codec hdmi-audio-codec.5.auto: Only one simultaneous stream supported!
[   55.404092] hdmi-audio-codec hdmi-audio-codec.5.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -22