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I updated my Surface Pro 3 From Ubuntu 17.10 to Ubuntu 18.04 (did a clean install) and now I can only get audio when using the headphone jack. I have already tried all these:
troubleshooting guide
this answer
another answer

I went back and tested the live CD and even the live cd has no audio through the speakers. so this must be related to 18.04. I never had sound issues before and under windows audio still works correctly.
Does anyone have any idea how to fix this?

Update: here is my alsa iformation

Update HOLY CRAP... I removed the /etc/modprobe.d/alsa-base.conf and now sounds works ! i am going to try adding line by line to see which config entry was breaking the audio

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    What happens if you disable "Auto-mute" in alsamixer
    – stumblebee
    May 9, 2018 at 19:46
  • @stumblebee nothing. I tried disabling it then reconecting headphones and switching the mute on all channels. same problem
    – Carlos Roque
    May 9, 2018 at 19:53
  • With my alc662 did not work at all. I am desperate. NO SOUND
    – n_lona
    Apr 1, 2019 at 21:31
  • I've disabled "auto-mute" in alsamixer and it worked. Thank you.
    – rmmariano
    Sep 12, 2020 at 0:02

1 Answer 1

Reset to default
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welp.... I have no idea what just happened.... but renaming /etc/modprobe.d/alsa-base.conf to /etc/modprobe.d/alsa-base.bk , then rebooting the computer fixed the my speaker sound issue.

I then restored line by line to /etc/modprobe.d/alsa-base.conf, rebooting between restored lines, until all lines were back.... and ... it still worked! so I restored the original /etc/modprobe.d/alsa-base.conf and rebooted the computer and everything was still working.... so I am not sure what the problem was but is now fixed.

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