https://bugzilla.kernel.org/show_bug.cgi?id=221179
Bug ID: 221179
Summary: [Lenovo IdeaPad Pro 5 14AHP9] ACPI BIOS Error on every
resume: AE_NOT_FOUND [^^^GPP6.RTKW] aborts
\_SB.PEP._DSM; EC mutex contention AE_AML_NOT_OWNER
[ECMT] after long suspend
Product: ACPI
Version: 2.5
Hardware: AMD
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: EC
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 309562
--> https://bugzilla.kernel.org/attachment.cgi?id=309562&action=edit
ACPI tables from Lenovo IdeaPad Pro 5 14AHP9 (BIOS NBCN29WW)
Hardware:
Model: Lenovo IdeaPad Pro 5 14AHP9 (Xiaoxin Pro 14 2024 AMD)
BIOS: BIOS: NBCN29WW (updated from NBCN25WW, issue persists)
CPU: AMD Ryzen AI (Strix Point / Hawk Point)
Kernel: 6.18.13-200.fc43.x86_64
OS: Fedora Silverblue 43
Suspend type: s2idle
== Bug 1: Unresolved symbol [^^^GPP6.RTKW] on every resume ==
Reproducible 100% of the time on every resume from s2idle.
Kernel log:
ACPI: EC: interrupt blocked
ACPI BIOS Error (bug): Could not resolve symbol [^^^GPP6.RTKW], AE_NOT_FOUND
(20250807/psargs-332)
ACPI Error: Aborting method \_SB.PCI0.LPC0.EC0.UPHK due to previous error
(AE_NOT_FOUND) (20250807/psparse-529)
ACPI Error: Aborting method \_SB.PEP._DSM due to previous error
(AE_NOT_FOUND) (20250807/psparse-529)
ACPI: EC: interrupt unblocked
The DSDT method \_SB.PCI0.LPC0.EC0.UPHK references ^^^GPP6.RTKW, which does not
exist in the ACPI namespace. This causes \_SB.PEP._DSM (AMD Platform Extension
Plugin DSM) to abort on every resume, potentially degrading platform idle and
power management.
== Bug 2: EC mutex [ECMT] ownership error after long suspend (~8+ hours) ==
Appears only after longer suspend durations.
Kernel log:
ACPI Error: Thread 3534585856 cannot release Mutex [ECMT] acquired by thread
2230648832 (20250807/exmutex-378)
ACPI Error: Aborting method \_SB.PCI0.LPC0.EC0.ECCC due to previous error
(AE_AML_NOT_OWNER) (20250807/psparse-529)
ACPI Error: Aborting method \_SB.PCI0.LPC0.EC0.RPAM due to previous error
(AE_AML_NOT_OWNER) (20250807/psparse-529)
ACPI Error: Aborting method \_SB.PCI0.LPC0.EC0._Q96 due to previous error
(AE_AML_NOT_OWNER) (20250807/psparse-529)
ACPI Error: Aborting method \_SB.PCI0.LPC0.EC0._Q93 due to previous error
(AE_AML_NOT_OWNER) (20250807/psparse-529)
EC query handlers _Q93 / _Q96 (likely triggered by hardware events queued
during
sleep) attempt to release ECMT but it is held by a different AML thread,
indicating a mutex ownership imbalance in the DSDT EC query dispatch path.
== Steps to reproduce ==
Bug 1: Resume from any s2idle suspend. 100% reproducible.
Bug 2: Suspend for ~8 hours or more, then resume.
== Notes ==
ACPI dump available on request (sudo acpidump > acpidump.dat).
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