I'm seeing this same problem on xubuntu 14.04. It seems to happen in various applications including Firefox, Terminal Emulator and Pycharm Community Edition 2016.1.
I am unable to type anything and clicking the mouses buttons (right, left or center) seems to do nothing.
Since I'm seeing this issue on a notebook computer, I can confirm that it occurs with both a wired USB mouse when using the touchpad. When it happens with the mouse, if I unplug it and plug it back in it functions as expected again.
I'm seeing this same problem on xubuntu 14.04. It seems to happen in various applications including Firefox, Terminal Emulator and Pycharm Community Edition 2016.1.
I am unable to type anything and clicking the mouses buttons (right, left or center) seems to do nothing.
Since I'm seeing this issue on a notebook computer, I can confirm that it occurs with both a wired USB mouse when using the touchpad. When it happens with the mouse, if I unplug it and plug it back in it functions as expected again.