From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: Powerdown problem on XEN | ACPI S5
Date: Wed, 14 Aug 2013 16:37:51 -0400
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To: Ben Guthro <ben@guthro.net>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>, xen-devel <xen-devel@lists.xenproject.org>, Atom2 <ariel.atom2@web2web.at>, Jan Beulich <JBeulich@suse.com>, Ian Campbell <ian.campbell@citrix.com>
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On Wed, Aug 14, 2013 at 04:34:21PM -0400, Ben Guthro wrote:
> This hang looks exactly like this one that I posted about in June:
> http://www.gossamer-threads.com/lists/xen/devel/284943?do=post_view_threaded#284943
> 
> This ended up being an interaction with the i915 driver in the kernel, and
> pvops use of PAT.
> 
> If you revert the following linux commit:
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c79c49826270b8b0061b2fca840fc3f013c8a78a

And probably also need to revert
8eaffa67b43e99ae581622c5133e20b0f48bcef1
?
> 
> and then apply:
> https://lkml.org/lkml/2012/2/10/229
> 
> You may get good results.
> It helped me with a similar problem, at least.
> 
> Ben
> 
> 
> 
> On Wed, Aug 14, 2013 at 4:24 PM, Atom2 <ariel.atom2@web2web.at> wrote:
> 
> > Am 14.08.13 22:18, schrieb Andrew Cooper:
> > [...]
> >
> >>
> >> Ok thanks.
> >>
> >> Do you mind confirming whether S5 works with "iommu=off" on the Xen
> >> command line?
> >>
> >> ~Andrew
> >>
> >>  Yes, that works: The system powers off after issuing
> >         shutdown -h now
> > from the dom0.
> >
> >
> > ______________________________**_________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
> >

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