No headphone sound on imac 12,2 using 12.04

[Yinnus McFlannigan]

Here's my issue.

My internal speakers work fine and even mute when i plug my external speakers in the headphone jack. However i have no sound coming out of my external speakers when plugged in. i checked my levels and everything is fine and unmuted and the sound settings even show "headphones" in the output tab but when i test them i get nothing. at least this is a step up from 11.10 where the internal speakers would not mute and wouldn't even recognize the headphone jack. i've tried all the recommended
options snd-hda-intel model= settings and nothing. when i put in imac27 the system doesn't mute the internals and doesn't recognize my headphone jack at all.

any help would be great.

thanks...

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[johnhamelink (johnhamelink)]

I also have this problem. After a bit of reading I found out about the imac27_122 model, but it doesn't work for me either. The best sound output I can get (from the comes from mbp55, but then the audio never plays from the headphones. I own a 27" imac (the model before the retina display model).

[johnhamelink (johnhamelink)]

Sorry, it's late here - a quick sentence clarification: The best sound output I can get (from the internal speaker) comes from the mbp55. With the mbp55 model, I get no headphone sound, but there is a "headphone" setting in alsamixer.

[Yinnus McFlannigan (mistersmith1978)]

DUDE!!!! you totally made me week.

  i put the imac27_122 in the alsa-base file but no luck. BUT i thought about updating the kernel to 3.5 and after a reboot. POW!!!!! working headphone jack..

so just put the options snd-hda-intel model=imac27_122 at the end of the file, update the linux kernel to 3.5 and it will work.

thank you sooooo much man

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for alsa-driver (Ubuntu) because there has been no activity for 60 days.]