ubuntu 16.04 alt + tab not working properly

After updating ubuntu from 14.04 to 16.04 I've experience this weird behavior. When I press Alt+Tab, two interfaces show up, the one from unity (the same that showed up when I was using the 14.04), and another that i don't have an idea from where it came from... LOL (no I didn't read the changelog, sorry for that XD ).

Thanks in advance.

Solution 1:

I've been seeing the same thing on one system, and it's a bit annoying. I finally accidentally stumbled upon the answer for my case:

It was the Compiz switcher also capturing the ALT - TAB key combo along with the Unity switcher.

It can be disabled by installing the CompizConfig Settings Manager:

sudo apt-get install compizconfig-settings-manager

I ran it by clicking on the Search icon and typing:

CompizConfig

Then click on the icon.

Click on Window Manager → Application Switcher and disable the Next Window key.

Hope this helps you too.

Solution 2:

or call also CompizConfig Settings Manager via Terminal:

1.

sudo apt install compizconfig-settings-manager

2. Open the CompizConfig Settings Manager by typing:

   ccsm

3. Select "Window Management"

4. Uncheck "Application Switcher"