https://bugzilla.kernel.org/show_bug.cgi?id=105321
Bug ID: 105321
Summary: AE_AML_MUTEX_ORDER on Thinkpad Yoga 12, when method
auto-serialization is enabled
Product: ACPI
Version: 2.5
Kernel Version: 3.19.0
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ACPICA-Core
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Dmesg shows various ACPI issues related to Mutex ordering when
auto-serialzation is enabled, such as:
[ 2222.365750] ACPI Error: Cannot release Mutex [MWGS], SyncLevel mismatch:
mutex 7 current 0 (20141107/exmutex-415)
[ 2222.365754] ACPI Error: Method parse/execution failed
[\_SB_.PCI0.LPCB.EC0_.HKEY.WTGP] (Node ffff8802250cae88), AE_AML_MUTEX_ORDER
(20141107/psparse-536)
[ 2222.365757] ACPI Error: Method parse/execution failed
[\_SB_.PCI0.LPCB.EC0_.HKEY.SWBO] (Node ffff8802250cae10), AE_AML_MUTEX_ORDER
(20141107/psparse-536)
[ 2222.365759] ACPI Error: Method parse/execution failed
[\_SB_.PCI0.LPCB.EC0_.HKEY.BPWC] (Node ffff8802250cad70), AE_AML_MUTEX_ORDER
(20141107/psparse-536)
[ 2222.365761] ACPI Error: Method parse/execution failed
[\_SB_.PCI0.LPCB.EC0_.HKEY.WGWK] (Node ffff8802250cade8), AE_AML_MUTEX_ORDER
(20141107/psparse-536)
[ 2222.365763] ACPI Error: Method parse/execution failed [\WAKH] (Node
ffff8802250caf00), AE_AML_MUTEX_ORDER (20141107/psparse-536)
[ 2222.365765] ACPI Error: Method parse/execution failed [\_WAK] (Node
ffff8802250bcb90), AE_AML_MUTEX_ORDER (20141107/psparse-536)
[ 2222.365767] ACPI Exception: AE_AML_MUTEX_ORDER, While executing method \_WAK
(20141107/hwesleep-83)
Tracing through the DSDT with acpiexec shows the same, unless
auto-serialisation is disabled.
This bug / patch seems relevant, although relates to synclevels on methods I
think - not mutex:
https://bugzilla.kernel.org/show_bug.cgi?id=52191
http://www.spinics.net/lists/linux-acpi/msg49548.html
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