Re: [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when reasonable

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On Tue, Nov 22, 2011 at 07:31:34PM -0800, Keith Packard wrote:
> On Tue, 22 Nov 2011 20:15:31 +0000, Matthew Garrett <mjg@xxxxxxxxxx> wrote:
> 
> > So the user has to choose between 5W of power saving or having dmar? And 
> > we default to giving them dmar? I think that's going to come as a 
> > surprise to people.
> 
> You'd have to go into the BIOS to turn this on for most machines at
> least?
> 
> But, yeah, it seems like we should be turning DMAR off unless explicitly
> requested; I can't understand how you'd ever need this running native on
> the hardware. Not exactly an area I care about deeply; I've always
> worked hard to make sure all virtualization garbage is disabled on every
> machine I use.

Problem is that we need to disable dmar on the entire box, afaics. And I
assume that a bunch of people abusing desktop boards as servers will call
"regression" on that.
-Daniel
-- 
Daniel Vetter
Mail: daniel@xxxxxxxx
Mobile: +41 (0)79 365 57 48
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