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Date: Tue, 26 Feb 2013 19:46:09 +0000
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Florian Weimer <fw@deneb.enyo.de>
Cc: "Theodore Ts'o" <tytso@mit.edu>, Dave Airlie <airlied@gmail.com>,
        Greg KH <gregkh@linuxfoundation.org>,
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        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [GIT PULL] Load keys from signed PE binaries
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On Tue, Feb 26, 2013 at 08:40:53PM +0100, Florian Weimer wrote:
> | No, there's no way to set the legacy boot as the default option.
> 
> <https://plus.google.com/100479847213284361344/posts/QhmBpn5GNE9>
> 
> So non-interactive booting of alternative operating systems is *not*
> supported.  This is way more restrictive than any x86 UEFI device I've
> heard of (even in the face of a potential revocation of the boot
> loader by Microsoft).

It's supported as long as you use Google's bootloader rather than a 
legacy one, but you're still stuck with either a 30-second boot delay or 
hitting ctrl+d and there's no way to install your own keys without 
disassembling the machine and physically disabling the write-protection 
on the firmware. It's certainly more hostile than any UEFI Secure Boot 
system I've found.

-- 
Matthew Garrett | mjg59@srcf.ucam.org