When I'm trying to switch windows by clicking on the icon in the Unity bar, it shows up the open windows and I can click on the one I want to switch to. But when I do that, my computer hangs up, for example if I'm playing music, the playback stutters.
I have a Radeon HD 7850, Phenom II X6 2.8ghz, 8 gb ddr3.
I'm not using the graphics driver from the Ubuntu repos because it's not working for some reason, I had to install the one from AMD's website. But still, Unity shouldn't be laggy while I'm transiting between windows.
Anything I can do to fix that?