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From: Jung-uk Kim <jkim@FreeBSD.org>
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Date: Thu, 27 Mar 2008 14:15:39 -0400
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Subject: Re: X pausing until mouse move (collecting commonalities)
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On Wednesday 26 March 2008 04:54 pm, Jung-uk Kim wrote:
> I think I know why.  Build xorg-server without HAL support option
> and the attached patch.  With HAL support (default) and hald
> running, xorg-server auto-detects individual ports with input.mouse
> capability even without configuration lines in xorg.conf.  If
> moused is enabled and USB mouse is used, /dev/ums0 is directly used
> because there is a problem in MD code (see attached patch).  If
> moused is enabled and PS/2 mouse is used, you end up with two input
> devices
> via /dev/sysmouse and /dev/psm0.  I couldn't find a cleaner way to
> fix this problem, though. :-(

It seems xorg-server has an undocumented option to turn it off, i.e., 
no need to recompile.  Option "autoAddDevices" "false" in ServerFlags 
or ServerLayout section should do.

FYI...

Jung-uk Kim