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The Sounds Panel in the System Settings does not show any of my speakers. Also, using the GUI to adjust the volume does not work at all.

However, the speakers work and applications can actually play audio. Trying to adjust the volume through alsamixer works, though.

Here is what details I have about my audio device using lspci

00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)

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Reinstalling alsa-base and pulseaudio did the trick for me.

sudo apt-get remove --purge alsa-base pulseaudio

sudo apt-get install alsa-base pulseaudio 

Then, if necessary:

sudo alsa force-reload

and

reboot

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