Arch Linux

haigioli

Member

Registered: 2018-09-06

Posts: 133

ACPI errors after update to 6.19.11

I'm getting the following ACPI errors during boot on my laptop.  This was not present before updating to kernel 6.19.11.

[   17.948940] clevo_acpi: failed to evaluate _DSM
[   17.949605] ACPI BIOS Error (bug): AE_AML_BUFFER_LIMIT, Field [S907] at bit offset/length 112/16 exceeds size of target Buffer (120 bits) (20250807/dsopcode-198)
[   17.949610] ACPI Error: Aborting method \_SB.DCHU.PEVT due to previous error (AE_AML_BUFFER_LIMIT) (20250807/psparse-529)
[   17.949621] ACPI Error: Aborting method \_SB.DCHU._DSM due to previous error (AE_AML_BUFFER_LIMIT) (20250807/psparse-529)
[   17.949626] ACPI: \_SB_.DCHU: failed to evaluate _DSM e424f293-dcfb-bf4b-add6-db71bdc0afad rev:0 func:4 (0x300a)
[   17.949628] clevo_acpi: failed to evaluate _DSM

The BIOS never produced this bug with previous 6.19 kernels.  How do I clear this error?

Thanks.

5hridhyan

Member

From: Asia

Registered: 2025-12-25

Posts: 557

Re: ACPI errors after update to 6.19.11

Fans working?
Keyboard backlight? (if there)
performance modes or power profiles working??
suspend/hibernation?
battery reporting?
brightness?

Edit:
in short if your laptop is behaving normally, then these are just noise

Last edited by 5hridhyan (2026-04-08 04:46:06)

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haigioli

Member

Registered: 2018-09-06

Posts: 133

Re: ACPI errors after update to 6.19.11

Actually, it looks like cpu boost states, which should go up to 5.1 GHz, is currently reduced to 3.29 GHz.  This is according to cpupower frequency-info.

 sudo cpupower frequency-info 
analyzing CPU 4:
  driver: amd-pstate-epp
  CPUs which run at the same hardware frequency: 4
  CPUs which need to have their frequency coordinated by software: 4
  energy performance preference: performance
  hardware limits: 605 MHz - 3.29 GHz
  available cpufreq governors: performance powersave
  current policy: frequency should be within 605 MHz and 3.29 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 1.99 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: yes
  amd-pstate limits:
    Highest Performance: 125. Maximum Frequency: 3.29 GHz.
    Nominal Performance: 76. Nominal Frequency: 2.00 GHz.
    Lowest Non-linear Performance: 23. Lowest Non-linear Frequency: 605 MHz.
    Lowest Performance: 23. Lowest Frequency: 599 MHz.
    Preferred Core Support: 0. Preferred Core Ranking: 125.

I'd like the boost setting to be back.

Last edited by haigioli (2026-04-08 11:20:11)

haigioli

Member

Registered: 2018-09-06

Posts: 133

Re: ACPI errors after update to 6.19.11

I've always had 'initcall_blacklist=acpi_cpufreq_init' in my grub.cfg.  Is this causing a problem, now?  I usually pair it with 'amd_pstate=passive' so that I have more granular control over cpu power scaling for some realtime applications.

But, upon further investigation, cpu power scaling seems to be working fine.  With passive turned on, I get the full range of boost states.

What seem the be the problem is that I don't hear any fans.

'sensors-detect' lists the following:

Sorry, no sensors were detected.
This is relatively common on laptops, where thermal management is
handled by ACPI rather than the OS.

Temps appear to be reporting with 'sensors':

iwlwifi_1-virtual-0
Adapter: Virtual device
temp1:        +31.0°C  

spd5118-i2c-21-50
Adapter: SMBus PIIX4 adapter port 0 at 0b00
temp1:        +36.0°C  (low  =  +0.0°C, high = +55.0°C)
                       (crit low =  +0.0°C, crit = +85.0°C)

amdgpu-pci-c300
Adapter: PCI adapter
vddgfx:        0.00 V  
vddnb:         0.00 V  
edge:         +37.0°C  
PPT:           4.08 W  (avg =   4.08 W)
sclk:         630 MHz 

BAT0-acpi-0
Adapter: ACPI interface
in0:          17.44 V  
curr1:         0.00 A  

spd5118-i2c-21-51
Adapter: SMBus PIIX4 adapter port 0 at 0b00
temp1:        +37.2°C  (low  =  +0.0°C, high = +55.0°C)
                       (crit low =  +0.0°C, crit = +85.0°C)

k10temp-pci-00c3
Adapter: PCI adapter
Tctl:         +40.6°C  

nvme-pci-c100
Adapter: PCI adapter
Composite:    +33.9°C  (low  = -273.1°C, high = +84.8°C)
                       (crit = +84.8°C)
Sensor 1:     +32.9°C  (low  = -273.1°C, high = +65261.8°C)
Sensor 2:     +33.9°C  (low  = -273.1°C, high = +65261.8°C)

acpitz-acpi-0
Adapter: ACPI interface
temp1:        +40.0°C  

The only thing is that I haven't heard fans turn on at all.  How do I test this?

Last edited by haigioli (2026-04-08 11:48:25)

5hridhyan

Member

From: Asia

Registered: 2025-12-25

Posts: 557

Re: ACPI errors after update to 6.19.11

so you say you don't hear fans at all, so you sus fans are not working, but looking at your temps, it shows 40, in many laptops, there is hardcoded rules that the fans spin up, only when they hit 65+, for example HP Notebook models, they spin at fast when they hit 70, which laptop is yours? how was the behavior before this kernel version?
are you using TLP/power-profile daemons? or auto-cpufreq?

Edit:
Re-wrote post according to OPs latest status quo

Edit2:
you can test by stress test, https://wiki.archlinux.org/title/Stress_testing to see upon high temps, if the fan spins up/you can hear them spinning

Last edited by 5hridhyan (2026-04-08 12:10:01)

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haigioli

Member

Registered: 2018-09-06

Posts: 133

Re: ACPI errors after update to 6.19.11

Thank you for your patience and help, @5hridyan.

I use 'tuned' with 'tuned-ppd' quite successfully for a long time.  Sometimes, when I 'need to be sure' because of the RT apps I write and run, I disable all that and set my cpu scaling with 'cpupower' with amd pstate driver set to 'passive' explicitly.  Most of the time, though, active with tuned is what I use for day-to-day on this laptop.

I'll hit my CPU harder and see if I can get through the threshold, but two things:

1)  I noticed no fans listed in '/sys/class/hwmon*'

2)  pwmconfig reports no pwn controllers

Now, I don't know if that's normal for clevo-based laptops because I never really checked before this (fans kicked in and all seemed well, so I never checked).

'sensors' reports no fan info (as you can see).

5hridhyan

Member

From: Asia

Registered: 2025-12-25

Posts: 557

Re: ACPI errors after update to 6.19.11

No problem
once see this

┌──(shridhyan@ATRNXA)-[~]
└─$ sensors            
hp-isa-0000
Adapter: ISA adapter
pwm1:             N/A

amdgpu-pci-0400
Adapter: PCI adapter
vddgfx:           N/A  
vddnb:            N/A  
edge:         +49.0°C  
sclk:         200 MHz 

BAT0-acpi-0
Adapter: ACPI interface
in0:          12.88 V  
curr1:         0.00 A  

k10temp-pci-00c3
Adapter: PCI adapter
Tctl:         +49.4°C  

nvme-pci-0100
Adapter: PCI adapter
Composite:    +29.9°C  (low  =  -0.1°C, high = +84.8°C)
                       (crit = +94.8°C)
ERROR: Can't get value of subfeature temp2_min: I/O error
ERROR: Can't get value of subfeature temp2_max: I/O error
Sensor 1:     +47.9°C  (low  =  +0.0°C, high =  +0.0°C)

acpitz-acpi-0
Adapter: ACPI interface
temp1:        +49.0°C  
temp2:         +0.0°C  

┌──(shridhyan@ATRNXA)-[~]
└─$ ls /sys/class/hwmon* 
 hwmon0   hwmon1   hwmon2   hwmon3   hwmon4   hwmon5   hwmon6
┌──(shridhyan@ATRNXA)-[~]
└─$ pwmconfig
You need to be root to run this script.
┌──(shridhyan@ATRNXA)-[~]
└─$ sudo pwmconfig     
[sudo] password for shridhyan: 
# pwmconfig version 3.6.2
This program will search your sensors for pulse width modulation (pwm)
controls, and test each one to see if it controls a fan on
your motherboard. Note that many motherboards do not have pwm
circuitry installed, even if your sensor chip supports pwm.

We will attempt to briefly stop each fan using the pwm controls.
The program will attempt to restore each fan to full speed
after testing. However, it is ** very important ** that you
physically verify that the fans have been to full speed
after the program has completed.

/usr/bin/pwmconfig: There are no pwm-capable sensor modules installed

as you can see, mine also reports 'N/A' for PWM and pwmconfig finds nothing, this is because, like your clevo, my HP handles fan logic through the embedded controller/ECrather than the OS, most laptops are designed this way, the BIOS/EC is the "brain" for the fans, and the Linux kernel is just a passenger...

also the fact that sensors doesn't show fan RPMs on your machine is almost certainly how it has always been, you're just noticing it now because those ACPI errors made you go looking for problems!

How did the stress test go? if it hit 65-70°C, did the 'ghost' fans finally make some noise??

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haigioli

Member

Registered: 2018-09-06

Posts: 133

Re: ACPI errors after update to 6.19.11

Good news is that all seems good.  Fans kick in elegantly.  So, going back to your original list of ACPI things to look for gotchas:  They all seem to be working fine.

Should I simply ignore these errors?  Should I monitor something just in case?

5hridhyan

Member

From: Asia

Registered: 2025-12-25

Posts: 557

Re: ACPI errors after update to 6.19.11

For context see mine.

Apr 08 09:35:37 ATRNXA kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.GPP2.BCM5], AE_NOT_FOUND (20250807/dswload2-162)
Apr 08 09:35:37 ATRNXA kernel: ACPI Error: AE_NOT_FOUND, During name lookup/catalog (20250807/psobject-220)
Apr 08 09:35:42 ATRNXA kernel: ACPI BIOS Error (bug): AE_AML_BUFFER_LIMIT, Index (0x000000032) is beyond end of object (length 0x32) (20250807/exopa>
Apr 08 09:35:42 ATRNXA kernel: ACPI Error: Aborting method \_SB.WMID.WQBE due to previous error (AE_AML_BUFFER_LIMIT) (20250807/psparse-529)

Should I simply ignore these errors?  Should I monitor something just in case?

if I were you I'd ignore those and chill, you can monitor, or test, if those errors is related with the "checklist" in #2

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seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 74,585

Re: ACPI errors after update to 6.19.11

Did clevo_acpi load before?

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