It happens like this: I work for myself, I work and bang! Mouse clicks stop working. The mouse moves on the screen, and the interface does not re-enable it by pressing. All windows (which can be seen) work fine, do not hang, but I can only work with the last active window or call the console, but I cannot return to the previous window with Alt + Tab, nothing happens when I press Alt + Tab. All that remains is to write commands to the console or reboot. This is on different Ubuntu, Lubuntu, etc. happens. Who faced?