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From: Eric Rannaud <eric.rannaud@gmail.com>
To: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>,
	Daniel Vetter <daniel.vetter@ffwll.ch>,
	"intel-gfx@lists.freedesktop.org"
	<intel-gfx@lists.freedesktop.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jon Kristensen <info@jonkri.com>
Subject: Re: i915: Regression: +4W in idle power use on Macbook Pro 15 (late 2013)
Date: Tue, 26 Aug 2014 07:57:50 -0700	[thread overview]
Message-ID: <CA+zRj8UkygXKKOHCgctQgAhtodxWz-oi7ZDkH2Dh6Wbe7zuQVA@mail.gmail.com> (raw)
In-Reply-To: <CA+zRj8UN-49tWhwpWPz-oyBvPFydijaw5j44J87U9oAHwD7aDw@mail.gmail.com>

On Tue, Aug 26, 2014 at 6:38 AM, Eric Rannaud <eric.rannaud@gmail.com> wrote:
> Could the FBC commit somehow also disable RC6, or similar?

I just tried these kernel arguments with no significant effect on
power consumption (i.e. still around 11W in idle, instead of under
7W):
        i915.enable_rc6=1 i915.lvds_downclock=1 pcie_aspm=force

Forcing FBC with i915.enable_fbc=1 brings the idle power consumption
back to under 7W, however.
This is all on 3.15.4-ARCH-00041-gf4db98240ac2.

  reply	other threads:[~2014-08-26 14:57 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-22 17:40 i915: Regression: +4W in idle power use on Macbook Pro 15 (late 2013) Eric Rannaud
2014-08-25 10:19 ` Jani Nikula
2014-08-25 10:22   ` Jani Nikula
2014-08-25 12:19     ` Eric Rannaud
2014-08-26 11:06       ` Ville Syrjälä
2014-08-26 13:38         ` Eric Rannaud
2014-08-26 14:57           ` Eric Rannaud [this message]
2014-08-26 20:59             ` Daniel Vetter
2014-08-26 23:00               ` Eric Rannaud
2014-08-27  9:17                 ` Ville Syrjälä
2014-08-27 17:50                   ` Eric Rannaud
2014-08-28 20:08                 ` Lu, Ran
2014-08-28 16:41     ` Sean V Kelley
2014-08-28 17:19       ` Eric Rannaud

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