Hifiberry AMP+ only recognized some times

About 50% of the times when I boot up Volumio (RPi3 + Hifiberry AMP+ + WiFi connection) the device just stays dead silent no matter what radio or song I play.

I checked the error log (journalctl -f) and it says (once per second):

Sep 08 07:10:43 volumio volumio[905]: amixer: Unable to find simple control 'Master',0
Sep 08 07:10:44 volumio volumio[905]: amixer: Unable to find simple control 'Master',0

I guess this means that the Hifiberry device is “not found”…?

I have to reboot a couple of times, and then the problem is gone and the sound works. Could it be a hardware problem? I think it’s unlikely.

What more debugging can I do to try to find a remedy for the problem? Any suggestions?
I attach a screenshot of my playback options.

Hi, I’ve already found the cause for this (included fix in next version).
To solve, do via SSH:

echo snd_bcm2835 >> /etc/modules

and reboot. Let me know how it goes

I did the edit and have rebooted 5 times. It worked every time. So the probability that this fixed the problem is high. :slight_smile: I’ll let you know if the problem comes back.

Thanks for your great work with Volumio.