Features missing after updating to 14.04, how to get them back?

Question

I'm new to ubuntu. After recently being inable to use my Ubuntu, I switched it on, and a few updates were going through.

After updates, I'm missing all this:

• my sound options from the top bar
• the sound at all, there is sound on login and while testing
• after suspending everything blocks
• a lot of information in system settings is missing, too

How can I get these back?

Answer 1

System settings come back after reinstalling this:

sudo apt-get install ubuntu-desktop

Sound is also back after

sudo apt-get install pavucontrol

then running

pavucontrol

and pointing it to the right device.