roadrunner2

@leifliddy Well, suspend/resume work with some notable caveats. Need to write it up.

@l1k Ok, tested this series, and works fine too. Also, you asked about which previous set of patches I had tested: they had commit dates of "Wed Jan 3 15:25:xy...

@mhkabir Excellent work! I played with this a bit, using the [apple_set_os.efi](https://github.com/0xbb/apple_set_os.efi) which works quite nicely. Turning off the dGPU saves quite a bit of power (dGPU only: 17.2W, dGPU+iGPU...

I measured the power consumption in several ways, but all of course with the power unplugged: `cat /sys/class/power_supply/BAT0/current_now` (together with `/voltage_now`), via `powertop`, and via the Gnome "Power Statistics" utility....

To expand on what @arno01 wrote, I have been using pretty the same setup with one notable difference: > Notice that I am blacklisting the amdgpu here, otherwise it won't...

@renatolfc Interesting: this allows you to disable the dGPU before logging in? I'll play around with blacklisting amdgpu and later loading it explictly then. As far as your backlight issues...

> The problem is that dGPU (ATI Radeon) is still powered and consuming A LOT of resources. I've seen you mentioned that the card should be loaded and powered off....

Does the other machine have multiple (powered on) GPU's? vgaswitcheroo only appears once a second GPU is registered.

@cristianmiranda Regarding `amdgpu` getting fixed on 5.6, you'll want to follow #142 and related kernel bug reports and discussions.

If folks could test the touchbar and light-sensor drivers on MacBookPro15,*, that would be very much appreciated. The driver is located at [roadrunner2/macbook12-spi-driver](https://github.com/roadrunner2/macbook12-spi-driver/tree/mbp15) (in the `mbp15` branch). See the README...