I have a fresh ubuntu on iMac. I have managed to set up the sound from the native speakers, however, there is still no sound from the headphones. I have disabled automute in alsamixer, but this didn't help. Does anyone know what to do in this case?
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Maybe you could manually change your output device in All Settings / Sound? – Pavel Dec 14 '13 at 17:27
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I did that already -- no positive result. – Eugene B Dec 14 '13 at 17:29
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The solution was found by adding a row of options snd-hda-intel model=imac27_122 to /etc/modprobe.d/alsa-base.conf as explained here.
Eugene B
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Worked for me with Ubuntu 16.04. Thx! Here some additional infos: https://help.ubuntu.com/community/HdaIntelSoundHowto – eidelen Nov 28 '17 at 09:24