Persistent Dummy Output

I don't know what's the problem or why it happens, but that worked for me.

pulseaudio --kill
pulseaudio --start

First, replace any previous configurations:

sudo apt-get update
mkdir PULSE
cd PULSE
apt-get download pulseaudio
ar xvf *
tar xvf dat*
sudo rm /etc/pulse/*
sudo mv etc/pulse/* /etc/pulse/

Then, run the following commands:

sudo apt-get install --reinstall linux-image-$(uname -r)
sudo modprobe snd-hda-intel
rm -r ~/.config/pulse*
pulseaudio -k

source

There doesn't seem to be a solution to this so I just re-installed Kubuntu and the sound works perfect.

Downside: wiped everything else (but I didn't have much on my ssd so it was fine)

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