217703 – XPS 17 9730 runs significantly warmer on Kernel 6.5-rc3 compared to Kernel 6.4.3

Bug 217703 - XPS 17 9730 runs significantly warmer on Kernel 6.5-rc3 compared to Kernel 6.4.3

Summary: XPS 17 9730 runs significantly warmer on Kernel 6.5-rc3 compared to Kernel 6.4.3

Status:	RESOLVED UNREPRODUCIBLE

Alias:	None

Product:	Linux
Classification:	Unclassified
Component:	Kernel (show other bugs)
Hardware:	Intel Linux

Importance:	P3 normal
Assignee:	acpi_power-thermal

URL:
Keywords:

Depends on:
Blocks:

Reported:	2023-07-25 11:30 UTC by Goran
Modified:	2023-07-28 18:17 UTC (History)
CC List:	2 users (show)

See Also:
Kernel Version:	6.5-rc3
Subsystem:
Regression:	No
Bisected commit-id:

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Description Goran 2023-07-25 11:30:24 UTC

On my new XPS 17 9730 laptop, I recently installed the Kernel 6.5-rc3. I noticed, however, that during its operation, the laptop was getting significantly warmer than before. I did some analysis using the 'stress' tool to measure and compare the difference in CPU temperatures between Kernel 6.4.3 and Kernel 6.5-rc3. Here are my results:

OS: Ubuntu 23.10
CPU: i7-13700H

kernel 6.4.3:
                                                                                                                                                                                        
Initial CPU temperature:
coretemp-isa-0000
Core 0:        +47.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 8:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 12:       +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 16:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 20:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
Core 24:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
Core 25:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
Core 26:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
Core 27:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
Core 28:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 29:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 30:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 31:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Stressing CPU for 30 seconds...
stress: info: [4858] dispatching hogs: 14 cpu, 0 io, 0 vm, 0 hdd
stress: info: [4858] successful run completed in 30s
CPU temperature immediately after stress test:
coretemp-isa-0000
Core 0:        +67.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +76.0°C  (high = +100.0°C, crit = +100.0°C)
Core 8:        +69.0°C  (high = +100.0°C, crit = +100.0°C)
Core 12:       +77.0°C  (high = +100.0°C, crit = +100.0°C)
Core 16:       +69.0°C  (high = +100.0°C, crit = +100.0°C)
Core 20:       +76.0°C  (high = +100.0°C, crit = +100.0°C)
Core 24:       +68.0°C  (high = +100.0°C, crit = +100.0°C)
Core 25:       +68.0°C  (high = +100.0°C, crit = +100.0°C)
Core 26:       +68.0°C  (high = +100.0°C, crit = +100.0°C)
Core 27:       +68.0°C  (high = +100.0°C, crit = +100.0°C)
Core 28:       +71.0°C  (high = +100.0°C, crit = +100.0°C)
Core 29:       +71.0°C  (high = +100.0°C, crit = +100.0°C)
Core 30:       +71.0°C  (high = +100.0°C, crit = +100.0°C)
Core 31:       +71.0°C  (high = +100.0°C, crit = +100.0°C)
Test ended at: Tue Jul 25 01:10:16 PM CEST 2023


kernel 6.5-rc-3:

Initial CPU temperature:
coretemp-isa-0000
Core 0:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 8:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 12:       +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 16:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
Core 20:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
Core 24:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 25:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 26:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 27:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 28:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 29:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 30:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 31:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
Stressing CPU for 30 seconds...
stress: info: [11146] dispatching hogs: 14 cpu, 0 io, 0 vm, 0 hdd
stress: info: [11146] successful run completed in 30s
CPU temperature immediately after stress test:
coretemp-isa-0000
Core 0:        +84.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +97.0°C  (high = +100.0°C, crit = +100.0°C)
Core 8:        +87.0°C  (high = +100.0°C, crit = +100.0°C)
Core 12:      +100.0°C  (high = +100.0°C, crit = +100.0°C)
Core 16:       +86.0°C  (high = +100.0°C, crit = +100.0°C)
Core 20:       +99.0°C  (high = +100.0°C, crit = +100.0°C)
Core 24:       +83.0°C  (high = +100.0°C, crit = +100.0°C)
Core 25:       +83.0°C  (high = +100.0°C, crit = +100.0°C)
Core 26:       +83.0°C  (high = +100.0°C, crit = +100.0°C)
Core 27:       +83.0°C  (high = +100.0°C, crit = +100.0°C)
Core 28:       +89.0°C  (high = +100.0°C, crit = +100.0°C)
Core 29:       +89.0°C  (high = +100.0°C, crit = +100.0°C)
Core 30:       +89.0°C  (high = +100.0°C, crit = +100.0°C)
Core 31:       +89.0°C  (high = +100.0°C, crit = +100.0°C)
Test ended at: Tue Jul 25 01:05:42 PM CEST 2023

I tested few times with different setup and CPU temp on 6.5-rc3 is always higher especially when stressing with fewer cores.

Comment 1 Bagas Sanjaya 2023-07-25 23:22:50 UTC

(In reply to Goran from comment #0)
> On my new XPS 17 9730 laptop, I recently installed the Kernel 6.5-rc3. I
> noticed, however, that during its operation, the laptop was getting
> significantly warmer than before. I did some analysis using the 'stress'
> tool to measure and compare the difference in CPU temperatures between
> Kernel 6.4.3 and Kernel 6.5-rc3. Here are my results:
> 
> OS: Ubuntu 23.10
> CPU: i7-13700H
> 
> kernel 6.4.3:
>                                                                             
> 
> Initial CPU temperature:
> coretemp-isa-0000
> Core 0:        +47.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 4:        +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 8:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 12:       +46.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 16:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 20:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 24:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 25:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 26:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 27:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 28:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 29:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 30:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 31:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Stressing CPU for 30 seconds...
> stress: info: [4858] dispatching hogs: 14 cpu, 0 io, 0 vm, 0 hdd
> stress: info: [4858] successful run completed in 30s
> CPU temperature immediately after stress test:
> coretemp-isa-0000
> Core 0:        +67.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 4:        +76.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 8:        +69.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 12:       +77.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 16:       +69.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 20:       +76.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 24:       +68.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 25:       +68.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 26:       +68.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 27:       +68.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 28:       +71.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 29:       +71.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 30:       +71.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 31:       +71.0°C  (high = +100.0°C, crit = +100.0°C)
> Test ended at: Tue Jul 25 01:10:16 PM CEST 2023
> 
> 
> kernel 6.5-rc-3:
> 
> Initial CPU temperature:
> coretemp-isa-0000
> Core 0:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 4:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 8:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 12:       +46.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 16:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 20:       +44.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 24:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 25:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 26:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 27:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 28:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 29:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 30:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 31:       +45.0°C  (high = +100.0°C, crit = +100.0°C)
> Stressing CPU for 30 seconds...
> stress: info: [11146] dispatching hogs: 14 cpu, 0 io, 0 vm, 0 hdd
> stress: info: [11146] successful run completed in 30s
> CPU temperature immediately after stress test:
> coretemp-isa-0000
> Core 0:        +84.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 4:        +97.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 8:        +87.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 12:      +100.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 16:       +86.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 20:       +99.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 24:       +83.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 25:       +83.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 26:       +83.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 27:       +83.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 28:       +89.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 29:       +89.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 30:       +89.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 31:       +89.0°C  (high = +100.0°C, crit = +100.0°C)
> Test ended at: Tue Jul 25 01:05:42 PM CEST 2023
> 
> I tested few times with different setup and CPU temp on 6.5-rc3 is always
> higher especially when stressing with fewer cores.

Can you perform bisection between v6.4 and v6.5-rc3?

Comment 2 Goran 2023-07-28 18:17:32 UTC

Although on Tuesday I repeated test 10 times and I got different result, today, after reinstalled both kernels, I repeated 10 times again and I got similar results between both kernel versions.

Now on both kernels, core20 spikes to +100.0°C and it stays there for the duration of the test. Other cores are going from 80-95°C.

Note that I used the mainline kernel installer for handling installation.

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