Third test: uname -a Linux quippy 5.17.3-1.g0d55cba-default #1 SMP PREEMPT Tue Apr 19 14:53:07 UTC 2022 (0d55cba) x86_64 x86_64 x86_64 GNU/Linux Nope: sudo dmesg | grep "BIOS Error" [ 0.455872] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PR00._CPC], AE_NOT_FOUND (20211217/psargs-330) [ 0.455925] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PR00._CPC], AE_NOT_FOUND (20211217/psargs-330) [ 0.455968] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PR00._CPC], AE_NOT_FOUND (20211217/psargs-330) [ 0.456009] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PR00._CPC], AE_NOT_FOUND (20211217/psargs-330) [ 0.456049] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PR00._CPC], AE_NOT_FOUND (20211217/psargs-330) So it is the reverted patch of the first test Kernel that needs further inspection.