Power Management problem [DeLL 5285 2-in-1]

[onibla]

Good morning guys, I need your help.

 

I'm installed Big Sur 11.3 on my DeLL tablet 5285 2-in-1. 

Spec:

• CPU : Intel® Core™ i5-7200U Processor (6M Cache, up to 2.70 GHz)
• Graphics : Intel® UHD Graphics 620
• Sound : Realtek ALC3253 (ALC225)
• Display : 12.3 Inch 1920 X 1280 (WUXGA+) 3:2 10 Points Multi Touch
• Memory : Samsung LPDDR3 8GB 1867MHZ (8GB * 2 Dual Channel)
• SSD : Panasonic nvme 1TB (2280), Western Digital PC SN520 NVMe SSD 512GB (2230)
• Wireless : Intel WiFi + BT 7260 
• Battery : 42WHr

 

I have configure almost all including touchscreen recognized as Trackpad 2.

 

But..... I have a big problem with power management.

 

When it is connected through Power supply I see the correct power management with processor-id 0x1

 

While, when I use only battery I see that CPU is ever at MAX 

This cause a rapid battery drain 

 

I have already use ssdtPRGen and CPUfriendFriend to generate my SSDT-PM and CPUFriendDataProvider.kext that result functional only when it is connected to Power supply, but not in Battery mode.

 

Do you have any suggestion to fix this problem?

 

Attached my SSDT-PM, CPUFriend and CPUFriendDataProvider.kext

5285 PM.zip

 

 

THANKS IN ADVANCE FOR YOUR SUPPORT

 

 

 

 

Edited October 18, 2022 by onibla

[Slice]

I may suggest to use Clover with its embedded Power Management abilities. I have good working PM on my Dell laptop. No SSDT, no CPUFriend, no ssdtPRGen.

[1Revenger1]

There's something causing your CPU utilization to be at 50%. That's probably why your having a lot of power management issues.
Is your trackpad or touchscreen in polling mode? That may potentially be causing the high CPU usage. Check Activity Monitor to see what's eating up CPU.

Edited October 20, 2022 by 1Revenger1