Bug#807528: vlc: after some time, clicks on the root window no longer work

[Vincent Lefevre]

On 2015-12-10 03:16:01 +0100, Vincent Lefevre wrote:
> After some time, clicks on the root window no longer work. VLC is
> the cause of this problem because as soon as I quit VLC, clicks on
> the root window work again.

I now remember that everytime this problem occurred, a USB mouse was
disconnected. So, this may be related.

Note: the machine is a laptop.
  * After disconnecting the USB mouse, the buttons of the touchpad
    have no effect over the root window.
  * After disconnecting the USB mouse and reconnecting it[*], the
    buttons of this USB mouse have no effect over the root window.
In both cases, the problem disappeared just after quitting VLC.

[*] This actually occurred due to a problem with a USB cable.
I had already mentioned the issue related to VLC here:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=805168#27

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