On Fri, 3 Aug 2007, Patrick Welche wrote:
> Any idea why I can't drop into ddb with ctl-alt-esc from a usb keyboard?
[snip]
> If I boot -d I get in and can type.

If 'boot -d' works, it's because your firmware setup USB legacy emulation. 
Once the USB keyboard driver attaches to the console, it is running in 
native mode -- and since interrupts are disabled when DDB is entered, the 
USB interface to the keyboard won't work as a result.

Sorry for the bad news.

Cheers,
Jared