This happens when Ubuntu asks for my password for getting updates or packages. If I press the menu-key at that moment (the one next to the Windows-key) a menu appears as usual. When I click on the password entry window it returns to the top but I can't enter my password, I can however press the two buttons "Cancel" and "Ok". If I try to enter text anyway nothing happens until I press "Cancel" or "Ok". If I press either of those buttons the password screen closes and the text I entered is added to the last active text field.
This happens when Ubuntu asks for my password for getting updates or packages. If I press the menu-key at that moment (the one next to the Windows-key) a menu appears as usual. When I click on the password entry window it returns to the top but I can't enter my password, I can however press the two buttons "Cancel" and "Ok". If I try to enter text anyway nothing happens until I press "Cancel" or "Ok". If I press either of those buttons the password screen closes and the text I entered is added to the last active text field.