How to restore audio output after updating Raspbian Buster on Pi4
Yesterday I did:
sudo apt update sudo apt upgrade
After reboot I lost my audio output. Whatever I did, it didn't come back. As far as I can tell, something messed up ALSA. I had the output through 3.5 headphone jack, and, at the moment I cannot check whether HDMI output works or not. Using
or raspi-config, or alsamixer to force the output to 3.5 analog output does nothing. Whenever I open alsamixer,, the default output is set back to bcm - HDMI 1.
Using pulseaudio I got audio on an USB external audio card. But not through ALSA and BCM chip.
What happened? What do I do?