Ubuntu 12.04 LTS. They worked fine until just a couple hours ago, and I see the other threads but they don't have solutions. None of 20 I must have looked at.
I looked at Alsamixer, but there is no auto-mute option. No matter how many times I hit the right arrow key. Muting the speakers mutes both the headphones and the speakers.
My headphones do not show up in the Sound Settings Output.
Any way to mute the speakers without muting the headphones would be appreciated. The speakers don't have to unmute when I unplug the headphones. Not physically breaking the speakers, but it might come to that.
I won't be able to follow instructions that aren't explicit, sorry. Thanks for anyone's time.