I have the same problem. This is because the window manager really is NOT composited.
Go to your System/Preferences/Appearance/Desktop Effects and check. They are set to NONE if you have the same problem as me. The real problem is that they can no longer be changed to something else, something lost the capability to run a compositing manager. It is a regression, as I was previously able to run a compositing manager. -- warning: Screen isn't composited. Please run compiz (fusion) or another compositing manager https://bugs.launchpad.net/bugs/359061 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs