Mouse motion event holds up the input

[Warren Block]

On Mon, 2 Jan 2012, Yuri wrote:

> This started from some system update.
>
> There are some strange dependencies on mouse motion event. For example, when 
> google is open in chromium and I click on some search choice, it only goes 
> there after I move the mouse, click itself is not enough.
>
> Same when I press "Ctrl-Alt-F1", it only goes to the black terminal when I 
> move the mouse.
> Another symptom that I think is related is that doubleclick on the word in 
> konsole in kde4, and in all browsers, isn't selecting the word as it should.
>
> I have rebuilt kde4 with all dependencies and it didn't help.
>
> What might be the problem?

That's (often) a classic problem with setting AllowEmptyInput Off.
   http://www.wonkity.com/~wblock/docs/html/aei.html