Ubuntu

ACPI BIOS Error (bug)

Asked by Test

When starting Ubuntu:

[0.178179] ACPI BIOS Error (bug): AE_AML_BUFFER_LIMIT, Index (0x00000000E) is beyond end of object (length 0xE) (20230331/exoparg2-393)
[0.178202] ACPI Error: Aborting method \_SB.PCI0.XHC.RHUB.HS15._PLD due to previous error (AE_AML_BUFFER_LIMIT) (20230331/psparse-529)

My BIOS is updated to the latest version. I'm using Ubuntu 22.04.4 LTS (jammy)

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Manfred Hampl (m-hampl) said : 		#1

Even if you tell that the BIOS version is the newest available version, that version does not fully comply with the rules that have been defined.
This is a quite frequent situation and can be solved only with an updated version of the BIOS, but it usually should not do any harm.

Do you see any problem (besides those two lines in the system messages)?

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Test (3560holy) said (last edit ): 		#2

Usually there are no more errors. Sometimes there are also bluetooth errors

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Manfred Hampl (m-hampl) said : 		#3

I doubt that there is any relationship between these BIOS error messages and bluetooth errors.

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Test (3560holy) said (last edit ): 		#4

Yes. These are just other bluetooth errors when starting the OS.
Can you explain what this error means? Is it possible to somehow fix it by configuring the system?

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Manfred Hampl (m-hampl) said : 		#5

I already told in my first answer:

This can be solved only with an updated version of the BIOS from the system manufacturer.

Why do you think that you have to fix something, if it does not have any effect (except two message lines in the logs)?

The only possibility for making these messages disappear that I know, is completely disabling the ACPI subsystem of your system. This, however, will disable functions of your computer which you will miss for sure (e.g. power management and plug-and-play).

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Test (3560holy) said : 		#6

Does this mean it doesn't work correctly now (like power management and plug-and-play)?

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Manfred Hampl (m-hampl) said : 		#7

I did not say that.

Do YOU see a problem with power management and plug-and-play on YOUR system now?

What I meant was: To get rid of these two messages, you have to switch off the whole ACPI subsystem, including everything working well.

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Test (3560holy) said (last edit ): 		#8

Yes. There is a problem with charging the battery (it won't charge). Sometimes there is a problem with bluetooth (it does not turn on). There is also a problem with the screen when it goes to sleep (it starts flickering). Could these problems be related to these bugs?

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Manfred Hampl (m-hampl) said : 		#9

If there is something wrong with power management, bluetooth or the display driver, then there should be other messages in the system logs. The two messages about the BIOS most probably are unrelated.

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Test (3560holy) said : 		#10

What is the reason for this error? What does it mean?

Can you help with this problem?

Provide an answer of your own, or ask Test for more information if necessary.

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