Low output volume

Solution 1:

There is a headphone and analog jack. You can go to the Sound options panel and adjust these manually with the slider. That way when you reboot, the sound wont be full on.

Solution 2:

When your in the NCurses GUI of alsamixer, have you tried to see if any channels are muted or very low? If any are muted, unmute it using the M key and make sure every channel is around 100%, you can use the arrow keys to adjust them.

Solution 3:

I had this problem too. What worked for me was installing pavucontrol. Then open it, then on the first tab (playback), you can move the slider to control alsamixer over 100%, i. e. over 0 db.