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I've installed Ubuntu 14.04 on my Lenovo X220 and it worked fine for two weeks without any issues. Now the Sound Devices are gone! They are not broken cause I can control them in the terminal with alsamixer but I can't switch to another device (for example Bluetooth). Everything worked absolutely fine but from one day to another its not working. Any ideas?

I already re-installed ALSA and PulseAudio but nothing changes...

Here is a screenshot from pulseaudio... pulseaudio dump

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Broken files. For me, the solution was to delete /home/USERNAME/.config/pulse.

After that,

killall pulseaudio-daemons

and restart it with

pulseaudio &

.

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