I'm using Ubuntu for a while now but since 11.10 I noticed some strange behavior. And even with Lubuntu, Xubuntu and Kubuntu I have the same problem.
Problem: After I logged into my account and used the system for while I am unable to use the system with my mouse. I can navigate through the open windows using the keyboard and even close them, start new, etc.
I can move the mouse over the whole desktop but cannot click on anything, even in the window which seems to be focused a click with the mouse has no effect on a button.Sometimes I able do draw some squares with the mouse on the desktop but nothing more.
The problem even occurs when I am using a live cd/usb stick. When using an installtion of -buntu in a virtual PC there are no problems. So this problem only exist when it is installed as a "real" OS.
In an older installation of Ubuntu I solved it by right-clicking on the window which seems to be focused and after that the mouse was "released" but this time this does not work.
- OS: Xubuntu 12.04
- Mouse: Trust Max Track
- CPU: AMD Athlon II X3 425
- Graphics: ATI Radeon HD 4550