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Date: Sun, 11 Sep 2011 15:10:48 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: Daniel Feenberg <feenberg@nber.org>
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Cc: FreeBSD <freebsd-questions@freebsd.org>
Subject: Re: KVM switch with FreeBSD-8.2
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On Sun, 11 Sep 2011, Daniel Feenberg wrote:

> If you are asking, "Is there a FreeBSD command to cause the KVM switch to 
> move to the next system?" then the answer is "I don't know and it would amaze 
> me if there were."

There's often a key sequence to advance to the next port or a specific 
port.

> If the question is "Does the switch care what the OS is?" then the answer is, 
> you can press the physical button on the switch to change the system 
> connected. The OS doesn't know it doesn't have the screen and keyboard, and 
> is in no way affected by the KVM switch, just as the KVM doesn't know or care 
> what the OS is.

Well... there's monitor detection by the video card.  That can cause 
problems.  Also, going through the KVM can reduce video quality with VGA 
and high resolutions.