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Date: Tue, 23 Jul 2013 07:54:19 +0200
From: Joel Dahl <joel@freebsd.org>
To: Neel Natu <neelnatu@gmail.com>
Subject: Re: Lenovo x220 - hangs on shutdown
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Cc: Konstantin Belousov <kostikbel@gmail.com>,
 Adrian Chadd <adrian@freebsd.org>, neel@freebsd.org, current@freebsd.org
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On Mon, Jul 22, 2013 at 02:32:06PM -0700, Neel Natu wrote:
> Hi Joel,
> 
> On Mon, Jul 22, 2013 at 1:36 PM, Konstantin Belousov
> <kostikbel@gmail.com> wrote:
> > On Mon, Jul 22, 2013 at 10:52:55AM -0700, Adrian Chadd wrote:
> >> Hi kib,
> >>
> >> Is there a wiki page or some other kind of documentation descibing how
> >> AMT works?
> > It is Intel documentation for vPro. Setting up AMT on the motherboard
> > is specific to the motherboard BIOS, you should look at the hardware
> > vendor documentation.
> >
> > Random googling for you revealed e.g. http://wiki.debian.org/AMT
> > which is actually good introduction (i.e. there is not much to say
> > about AMT usage in fact).
> >
> >>
> >> I'd like to set this up at home on some newer machines (read: buy
> >> machines that have this) but I don't know what/where to start.
> > For the controlling side of things, I use amttools, available in
> > ports collection as comms/amtterm.  The manual pages are brief
> > but useful.
> >
> > Amttools provide amttool(1) for power control, and amtterm/gamt for console.
> 
> Could you apply the following patch to amd64/amd64/pmap.c and see if it helps?
> http://people.freebsd.org/~neel/patches/pmap_remove_pages.patch

Yes, it helps. I can shutdown the machine from X again.

-- 
Joel