Don't know this is useful, anyhow, if you own a Lenovo 3000 N200 laptop, by adding the line: "options snd-hda-intel position_fix=1 model=lenovo" jack-detection turns on. If this method is used in conjunction with: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/414746/comments/54 , then everything should work fine after.
Don't know this is useful, anyhow, if you own a Lenovo 3000 N200 laptop, by adding the line: "options snd-hda-intel position_fix=1 model=lenovo" jack-detection turns on. If this method is used in conjunction with: https:/ /bugs.launchpad .net/ubuntu/ +source/ pulseaudio/ +bug/414746/ comments/ 54 , then everything should work fine after.