Sorry, I tagged the wrong bug when I was marking duplicates last night. There are around 15 bugs that report the same issue: speakers not being muted when headphones are plugged in. By comments on a couple bugs, this seems to be an across-the-board issue stemming from a line in /etc/modprobe.d/alsa-base:
A comment in bug 332542 indicates that this will fix this issue:
"it's in adding to:
/etc/modprobe.d/alsa-base
following line:
options snd-hda-intel model=auto"
Sorry, I tagged the wrong bug when I was marking duplicates last night. There are around 15 bugs that report the same issue: speakers not being muted when headphones are plugged in. By comments on a couple bugs, this seems to be an across-the-board issue stemming from a line in /etc/modprobe. d/alsa- base:
A comment in bug 332542 indicates that this will fix this issue: d/alsa- base
"it's in adding to:
/etc/modprobe.
following line:
options snd-hda-intel model=auto"