alsamixer automatically mutes headphones and speakers

http://askubuntu.com/questions/280566/my-headphones-mute-alsamixer-when-i-plug-them-in-hp-dv6-12-04

http://askubuntu.com/questions/541847/is-there-any-way-to-save-alsamixer-settings-other-than-alsactl-store

The two links above are two popular links about dealing with the auto-mute problem of alsamixer. However, the two don’t help my situation.

 

My solution

1. Type the following command:

sudo alsamixer

2. Use `RightArrow` key to navigate to right until you see “auto-mute”

3. Use `UpArrow` or `DownArrow` key to set it to “Disabled”

4. Use `Esc` to quit. Hope the audio won’t be muted after your next reboot!

 

Update 06/08/2017:

The solution is totally different if the problem is that when you plug in your headphone, both headphone and speaker have sound output.

1. in the terminal, open alsamixer.
2. use rightarrow to navigate to the rightmost until you see Auto-Mute option, then use uparrow to select Line Out
3. also make sure the other volume controls look like below

 

reference: https://askubuntu.com/questions/150887/sound-from-both-headphones-and-speakers