[ale] Capturing kernel panics during boot

[jb at sourceillustrated.com (John Wells)]

James P. Kinney III said:
> I haven't used Xen (yet). Do you not have the <shift><pg-up>controls
> from a normal terminal? I'll grant I haven't used that during a boot up
> so I can't verify it's an option at that time.

Nope. It depends on the type of error, from my experince. If it's not a
kernel panic, but an error from some module not be loaded in your initrd,
you'll be dropped to a busybox shell and you can indeed scroll up with
<shift><pg-up>. However, when it panics, it seems to lock the entire
terminal...