Arch Linux

valera0123

Member

Registered: 2025-03-01

Posts: 3

ACPI BIOS Errors when plugging/unplugging AC adapter and during boot

Hello everyone,
I am experiencing persistent ACPI-related errors on my HP Laptop 15s-fq5048ns running Arch Linux.
Every time I plug in or unplug the AC adapter, the following messages appear:

ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PC00.LPCB.EC0._Q20.PNOT], AE_NOT_FOUND
ACPI Error: Aborting method \_SB.PC00.LPCB.EC0._Q20 due to previous error (AE_NOT_FOUND)

Additionally, when the battery becomes fully charged, similar ACPI error messages are displayed.
These errors have been present since the initial installation of Arch Linux, regardless of the kernel version used. I have also updated the BIOS twice — from version F22 to the current version F27 — but the issue persists.

In the last two or three recent kernel releases (I cannot say exactly which one introduced it), I also started seeing the following errors, after the login prompt appears:

Arch Linux 6.18.13-arch1-1 (tty1)
archlinux login: [    ACPI BIOS Error (bug): AE_AML_BUFFER_LIMIT, Index (0x000000032) is beyond end of object (length 0x32) 20250807/exoparg2-393)
[    ACPI Error: Aborting method \_SB.WMID.WQBZ due to previous error (AE_AML_BUFFER_LIMIT) (20250807/psparse-529)
[    ACPI Error: Aborting method \_SB.WMID.WQBE due to previous error (AE_AML_BUFFER_LIMIT) (20250807/psparse-529)

After pressing Enter, the system continues normally and the login prompt appears.

I would like to ask for help in properly diagnosing and resolving this issue, if it is indeed fixable. Simply suppressing or ignoring the messages is not what I am looking for. I would prefer to understand whether this indicates a deeper firmware or kernel compatibility problem.

I am relatively new to Linux, so I would appreciate guidance on whether these ACPI errors indicate something more serious that I should address. I am attaching the journal from the latest boot in case it helps with troubleshooting.

http://0x0.st/P1ZF.txt

Thank you in advance for your assistance.

5hridhyan

Member

From: Asia

Registered: 2025-12-25

Posts: 350

Re: ACPI BIOS Errors when plugging/unplugging AC adapter and during boot

Mar 01 15:15:10 Aranya-Marjara kernel: ACPI BIOS Error (bug): AE_AML_BUFFER_LIMIT, Index (0x000000032) is beyond end of object (length 0x32) (202508>
Mar 01 15:15:10 Aranya-Marjara kernel: ACPI Error: Aborting method \_SB.WMID.WQBE due to previous error (AE_AML_BUFFER_LIMIT) (20250807/psparse-529)
Mar 01 15:15:05 Aranya-Marjara kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.GPP2.BCM5], AE_NOT_FOUND (20250807/dswload2-162)
Mar 01 15:15:05 Aranya-Marjara kernel: ACPI Error: AE_NOT_FOUND, During name lookup/catalog (20250807/psobject-220)

I agree with you,  the AE_AML_BUFFER_LIMIT from the logs I understood the firmware tries to read the 51st byte of a 50-byte list...
think of it like the kernel is more strict, it just aborts the method to stay safe.... If your hotkeys and power switching, Battery reporting, suspend/resume are working and no random shutdowns, in short if your system is stable... then it’s just the kernel being loud about sloppy firmware...

Edit
Added logs.
I'm also subscribing this thread to see if someone else gives a good response...

Last edited by 5hridhyan (2026-03-01 13:30:54)

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valera0123

Member

Registered: 2025-03-01

Posts: 3

Re: ACPI BIOS Errors when plugging/unplugging AC adapter and during boot

Got it, thanks