08-26-2021, 06:37 PM
Very odd. Here is one of my test systems configured for HDMI, Hardware mixer and "Display dB volume" On in Audio Config.
Code:
pi@rp1:~ $ amixer -c0
Simple mixer control 'HDMI',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback -10239 - 400
Mono: Playback -4543 [54%] [-45.43dB] [on]
pi@rp1:~ $