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Date: Fri, 02 Dec 2005 22:29:13 +1000
From: Peter Grehan <grehan@freebsd.org>
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To: Arun Sharma <arun@sharma-home.net>
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Cc: freebsd-ppc@freebsd.org
Subject: Re: ddb and usb keyboards
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Hi Arun,

> I noticed that I was able to interact with DDB using my usb keyboard 
> when the kernel panics due to a driver bug.
> 
> However, if I try to manually enter DDB using ctrl+alt+esc on the 
> console, DDB doesn't accept any input and I have to power cycle the 
> machine.

  I see the same behaviour :(

> Is there a good explanation for this behavior?

  I can't think of one. I guess it's possible that the USB keyboard/OCHI 
code is being re-entered when this happens, since I guess the key event 
is an upcall into syscons.

  Do you know if this happens with a USB keyboard on x86 ?

later,

Peter.