I've installed bumblebee at my laptop due to the 520M GPU following the steps mentioned here.
What I see after logging out and in is this.
But I've noticed now that I do have some effects I didn't have, in example the windows open with a bounce effect (if we can call it that way) and the alt+tab feature shows now the screenshots of the windows.
What can I do?
Here's the link to pastebin with contents of xorg.0.log.