[AudioI] AudioInjector Zero no longer being recognized by raspberrypi 4

[Tony Henrie]

I just read another very recent thread (02/21/21?) that appears to have the same issue I have. 

I have a AI zero installed on a raspberrypi4B with OpenAuto Pro installed on Raspbian. I recently re-installed the latest OAP version, starting from scratch, and updated everything, did the AudioInjector shell install and everything was working fine. I just did another update of raspbian - sudo apt update and sudo apt full-upgrade, this evening (03/19/21) and suddenly my soundcard is no longer showing up. Your response to the other email indicated an issue with Pulseaudio. I don’t believe this is the issue (but I may be wrong) because it was working just fine a few days ago (Raspberrypi.org <http://raspberrypi.org/> went to pulseaudio by default some time ago). Now, after the recent update my card doesn’t show up. It is installed correctly. I re-ran the setup script this evening when I discovered my AIZ wasn’t outputting. I can see that my iphone is connected via bluetooth to the rpi and that it is registering sound input, but there is “no output device”.

I am familiar with linux, but not adept. where should I start to debug? Alsamixer indicates "there are no controls for this device” and no sound device shows under “F6”. 

Tony Henrie
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