The headphones seem to work again:
- headphones on headphone jack worl
- sound volume is controlled by the "surround" volume
- headphones are correctly detected and mutes sound
unfortunately, don't know exactly when or why it started working/improved.
Recently seems something has changed in the volume control on my 2nd gen macbook (see https:/ /bugs.launchpad .net/ubuntu/ +bug/102818/ comments/ 18).
The headphones seem to work again:
- headphones on headphone jack worl
- sound volume is controlled by the "surround" volume
- headphones are correctly detected and mutes sound
unfortunately, don't know exactly when or why it started working/improved.