If alt-tab is not switching your screen, here is the solution .
Your problem with window manager is solved !! :)
Reference
http://askubuntu.com/questions/135685/alt-tab-does-not-switch
- Open the terminal and install compizconfig-settings-manager
- sudo apt-get install compizconfig-settings-manager
- Or search for
compizconfig-settings-manager
in Software Center and install from there. - Then go to system tools > preferences > compizconfig
- Go at the very bottom where it says windows management , Put a checkmark in application switcher.
Your problem with window manager is solved !! :)
Reference
http://askubuntu.com/questions/135685/alt-tab-does-not-switch