Lots of lagging after upgrade of xorg.

[Warren Block]

On Mon, 23 Apr 2012, Leslie Jensen wrote:

>
> Hello list.
>
> I'm experiencing a lot of lagging after I've upgraded xorg. I use XFCE and 
> just changing from one desktop to another now feels really slow.
>
> If I click on a button in an application I have to move the mouse pointer 
> before there's a reaction to the click.
>
> In a terminal window I also have to move the pointer outside before the input 
> from the keyboard is registered.

That is often a symptom of setting Option "AllowEmptyInput" "Off".

If you have AEI settings in xorg.conf, remove them.  Use Option 
"AutoAddDevices" "Off" to disable HAL input device detection.