Plugging in the headphones does not mute the laptops speakers, music does play out of the headphones but also continues to play out of the speakers as well. alsamixer's 'auto-mute mode' is already enabled.
when I look at the sound settings in, 'output devices' it only has 1 item in the list 'Speakers Built-in Audio'. Yet when looking at 'PulseAudio Volume Control' under 'output devices' the 'Port' drop-down list has 2 options 'speakers' & 'headphones'. Selecting 'headphones' from that list does mute the speakers.
Specs:
- Ubuntu 12.10
- Asus K55A.404
aplay -l output:
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC270 Analog [ALC270 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
