[Bug 110865] Rx480 consumes 20w more power in idle than under Windows

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110865

--- Comment #13 from Dieter Nützel <Dieter at nuetzel-hh.de> ---
(In reply to Dieter Nützel from comment #12)
> (In reply to Alex Deucher from comment #9)
> > Created attachment 144983 [details] [review] [review]
> > fix DC code
> > 
> > Can you try applying both of these patches?  Assuming both of your monitors
> > have the same timing this might work.
> 
> Didn't apply on amd-staging-drm-next, too.

BTW

Alex, is this the same problem?
My card never was below ~32 W (even with single monitor
but I have two identical HDMI 1920x1080)
PSTATE_xxxx is much higher than Martin's
didn't saw "zero fan" / zero core (no spinning fans)

Polaris 20 / 8GB Sapphire Radeon RX 580 Nitro+
single monitor

GFX Clocks and Power:
        300 MHz (MCLK)
        300 MHz (SCLK)
        600 MHz (PSTATE_SCLK)
        1000 MHz (PSTATE_MCLK)
        750 mV (VDDGFX)
        32.17 W (average GPU)

GPU Temperature: 31 C
GPU Load: 0 %

amdgpu-pci-0100
Adapter: PCI adapter
vddgfx:       +0.75 V  
fan1:         909 RPM  (min =    0 RPM, max = 3200 RPM)
temp1:        +30.0°C  (crit = +94.0°C, hyst = -273.1°C)
power1:       32.09 W  (cap = 175.00 W)

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