XPS 15 9570 Catalina Power Management Issues

After having my 9570 for over a year now, I've finally decided to Hackintosh it, wanting to use Catalina because my desktop is stuck on High Sierra with a GTX 1060.

I decided to go with bavariancake's Clover EFI with a few modifications (changing it to MacbookPro15,3 instead of 15,1, and using VertStub.kext along with Combo Jack to fix the headphone jack) and pretty much everything works perfectly. Here are my specs:

Dell XPS 15 9570 4k Touch

i7 8750H

Intel UHD 630 + GTX 1050 Ti

32GB DDR4

1TB M.2 NVMe SK hynix SSD

Killer 1535 (I'm looking to get a DW 1830, but in the meantime I'm just using a USB C Ethernet adapter for internet)

The main issue I'm having right now is with power management. Using Intel Power Gadget, at idle I'm drawing anywhere between 3 and 10 watts, and under load it goes up from there. I'm not 100% sure if those are reasonable, but theoretically with 10W at idle I should be getting 9-10hrs of battery life (95Wh/10W=9.5h). Instead, I'm getting 3-5hrs idle and less under light-moderate load.

Intel Power Gadget also says the CPU package temp at idle is around 59C, which is pretty close to what I get in Windows, however it feels like it's much hotter (the bottom of the laptop feels about as hot as it does in Windows near 100C). HWMonitor agrees with these numbers, however I'm using VirtualSMC not FakeSMC so I don't know how much those numbers can be trusted.

Another sign (I think) that PM isn't working properly is that when I put the machine to sleep, the temperature remains pretty much the same, the fans keep spinning (with Windows sleeping, they'd shut off after a few minutes), and the battery drain is pretty much the same regardless of whether its asleep or awake.

What I've done already is the following. I've added -wegnoegpu to my Clover boot flags to try to fully disable the 1050 Ti, and that seems to have extended the battery life a little bit, but nothing too considerable. I've also disabled hibernation as suggested in RehabMan's guide, which had absolutely no effect. (Relating to that guide—in IORegistryExplorer, X86PlatformPlugins is not shown, and I haven't been able to find how I could get that to be loaded. Does anyone know much about that?)

I know that macOS doesn't deal well with NVMe power management. Could that be major cause of this, or just a small part (i.e. would switching to a M.2 SATA SSD fix my issues)? I'm also running with my Killer wireless card still enabled, which obviously doesn't work in macOS, but I don't think that would have this profound of an effect on power management.

If anyone has advice/experience with this, any help would be greatly appreciated!

submitted by /u/lajihouzi
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