[Intel-gfx] i915: Regression: +4W in idle power use on Macbook Pro 15 (late 2013)

[Eric Rannaud]

On Tue, Aug 26, 2014 at 6:38 AM, Eric Rannaud <eric.rannaud at 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.