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Author Topic: ACPI bug with kernel 5.12  (Read 687 times)

Offline demailly

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ACPI bug with kernel 5.12
« on: 2021/05/17, 07:38:04 »

The new kernels 5.12.4.x expose an ACPI bug that has been mentioned by many users (not necessarily using siduction). I have a processor Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz, an American Megatrends BIOS, version: 5.12. dmesg yields many lines of the form

May 16 19:41:40 siduction kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PR00._CPC], AE_NOT_FOUND (20210105/psargs-330)

In my case, the system boots and still seems somehow usable, but I guess that a patch is needed to avoid the above warnings. I have reverted to kernel 5.11.18 to be safe.

Many thanks for the hard work on siduction!

Offline devil

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Re: ACPI bug with kernel 5.12
« Reply #1 on: 2021/05/30, 09:54:58 »
Reports are all over the net, like here for Arch: https://bbs.archlinux.org/viewtopic.php?id=266085
ACPI warnings or errors can usually be ignored if you do not witness any related problems. It can take a long time before upstream fixes those glitches. I would just go on using 5.12 and following kernels and ignore the errors.

Offline DeepDayze

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Re: ACPI bug with kernel 5.12
« Reply #2 on: 2021/05/31, 18:51:00 »
I see this as well when I disabled builtin graphics on my Ryzen 3 3400G CPU in order for me to use my nVidia 1060 card in my desktop rig.