Bug 218212

Summary: Turbo Boost isn't working on Intel Kaby Lake R processor (i7-8650u)
Product: Platform Specific/Hardware Reporter: Ramen_LadyHKG (curie64hkg)
Component: x86-64Assignee: platform_x86_64 (platform_x86_64)
Status: NEW ---    
Severity: high    
Priority: P3    
Hardware: All   
OS: Linux   
URL: https://github.com/linux-surface/linux-surface/issues/1041
Kernel Version: 6.5.9 Subsystem:
Regression: No Bisected commit-id:
Attachments: Under Full load for 1minute, the CPU is still running under 10W Package Power

Description Ramen_LadyHKG 2023-12-01 01:42:58 UTC 
Created attachment 305522 [details]
Under Full load for 1minute, the CPU is still running under 10W Package Power

It’s a laptop from Microsoft, Surface Book 2. I run Fedora Linux and Arch Linux, both of them have this issue. Either vanilla kernel or surface kernel has the same problem.


I’ve tried most solution: cpupower tlp thermald throttled power-profiles-daemon intel-pstate s-tui turbostat disable SecureBoot I still cannot get it working.


The CPU is not hot, neither power throttling. I can get it up to 4.2GHz, 35W package on Windows with Throttlestop These digits are What I’ve never seen on Linux.


It always stays below 2.1GHz, 1.3GHz when all core are stressed, always below 55C. I’ve made sure, TurboBoost is on.


https://github.com/linux-surface/linux-surface/issues/1041

https://lemmy.world/post/8883518

https://www.techpowerup.com/forums/threads/i-cannot-get-turbo-boost-working-on-linux-for-my-intel-kaby-lake-r-processor-i7-8650u-always-below-10w-2-1ghz-current-throttling-surface-lapt.316202/

https://www.reddit.com/r/linux4noobs/comments/17w138n/i\_cannot\_get\_turbo\_boost\_working\_on\_linux\_for\_my/?sort=new
Comment 1 Artem S. Tashkinov 2023-12-01 06:21:42 UTC 
How does Windows behave on this device?
Comment 2 Ramen_LadyHKG 2023-12-02 01:12:02 UTC 
(In reply to Artem S. Tashkinov from comment #1)
> How does Windows behave on this device?

Factory Settings, able to turbo boost up to 35W and 3.5GHz. Running at about 90 degrees.

I use ThrottleStop to set PL1 to 20W PL2 30W, easy 4GHz 


This is the screenshots of performance I got on Windows.
https://preview.redd.it/vouk23iwvjba1.jpg?width=3240&format=pjpg&auto=webp&s=249e800e9bd13e8e3ca69882aee746ec5aed5889

https://www.reddit.com/r/Surface/comments/109rp06/surface_book_2_users_please_post_your_cinebench/
Comment 3 Ramen_LadyHKG 2023-12-02 01:16:32 UTC 
My GPU(GTX 1060 Mobile) performance got limited due to LOW CPU frequency.

Everything runs slower.
Comment 4 Ramen_LadyHKG 2023-12-02 01:25:03 UTC 
(In reply to Curie Cheong from comment #3)
> My GPU(GTX 1060 Mobile) performance got limited due to LOW CPU frequency.
> 
> Everything runs slower.

The onboard iGPU(HD620) gets limited as well.

For example, I run osu!lazer(natively) on Linux, I only get 30fps.
While on Windows, I got 120fps stable.
Comment 5 Ramen_LadyHKG 2023-12-02 01:46:51 UTC 
I also post on Intel Forum, hopefully could get their attention.
https://community.intel.com/t5/Processors/Turbo-Boost-isn-t-working-properly-with-Intel-i7-8650U-Kaby-Lake/m-p/1549828#M67367