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Date: Tue, 23 Mar 2004 13:12:02 +0100
From: Ruben de Groot <mail25@bzerk.org>
To: "Shaun T. Erickson" <ste@smxy.org>
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	"Shaun T. Erickson" <ste@smxy.org>, freebsd-questions@freebsd.org
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cc: freebsd-questions@freebsd.org
Subject: Re: disconnecting keyboard: big trouble !?!
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On Tue, Mar 23, 2004 at 01:22:53AM -0500, Shaun T. Erickson typed:
> Steve Ireland wrote:
> 
> >This is a PS/2 thing, not an operating system thing. You really can
> >fry your motherboard plugging and unplugging PS/2 devices while the
> >system is powered up.
> 
> I suppose it's possible, but I know I 've never fry'd one. I'm always 
> unplugging and pluging mine back in. The key to getting the keyboard 
> re-initialized, when you plug it back in - at least under 
> 5.2.1-RELEASE-p3 - is to change
> 
> hint.atkbd.0.flags="0x1"
> 
> to
> 
> hint.atkbd.0.flags="0x0"
> 
> in /boot/device.hints and reboot. After that, you can plug and unplug to 
> your heart's content. I'm told this setting may have to be made in the 
> kernel, requiring a custom kernel, in 4.x releases.
 
Yes. In 4.x GENERIC kernel, change the line:

device          atkbd0  at atkbdc? irq 1 flags 0x1

to:

device          atkbd0  at atkbdc? irq 1

recompile kernel and reboot.

Ruben