Restore sound configuration

Question

After install some packages, I don't have sound! I installed Rosegarden, VMPK (piano software), Drumstick Virtual Piano and TiMidity. At the beginning, all works fine, but when I reset my PC, I don't listen anything.

I would like how can I reinstall Alsa. I want to have it completely new, all the settings by default, for example when Ubuntu is installed.

Answer 1

Have you already visited official Ubuntu Sound troubleshoot page?

You may want to check default sound output device in your system, as new packages could add new devices and set them as primary/default.

Second, check whether your primary channel is not muted, for example with alsamixer console utility.

Answer 2

All the alsamixer settings are stored in: /var/lib/alsa/asound.state To restore alsa settings to factory default in raspberry pi 3:

Take a good alsa file, like: /MyBackup/asound.state

Make a backup of the bad alsa file:

sudo mv /var/lib/alsa/asound.state /var/lib/alsa/asound.state.bak5

Copy the good file instead of the bad one:

sudo cp /MyBackup/asound.state /var/lib/alsa/asound.state

And then run the following line ( the last number in the line is the sound card number ). The following command will read the file "/home/pi/temp1/asound.state" and put it's settings in the soundcard's registers. You can see in realtime the changes being applied in alsamixer app.

sudo alsactl restore 1