I reinstalled PulseAdio beacause I my indicator-sound just disappeared, but it didn't help. 

![enter image description here](https://i.stack.imgur.com/SPVIN.png)

Strangely, I have installed indicator-sound and still don't have that sound control. Nay, I don't even have any settings in "Sound Settings": 

![enter image description here](https://i.stack.imgur.com/qtBT6.png)

I ran "Volume Control PulseAudio" from unity launcher and I got this:

![enter image description here](https://i.stack.imgur.com/XJcml.png)

So I ran **start-pulseaudio-x11**:

```
$ start-pulseaudio-x11 
Connection failed: Connection refused
pa_context_connect() failed: Connection refused

```

What Can I do to fix it?