https://bugzilla.kernel.org/show_bug.cgi?id=221038
Bug ID: 221038
Summary: ACPI Warning: _SB.PR00._CPC type mismatch at index 24
(found Package, expected Integer/Buffer)
Product: ACPI
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: ACPICA-Core
Assignee: [email protected]
Reporter: [email protected]
Regression: No
In Intel Core Ultra 7 366H CPU, below warning showing in Linux kernel log, from
6.15 to 6.19 rc kernel :
[ 0.268507] ACPI Warning: _SB.PR00._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.269945] ACPI Warning: _SB.PR01._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.270822] ACPI Warning: _SB.PR02._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.271702] ACPI Warning: _SB.PR03._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.274312] ACPI Warning: _SB.PR04._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.276611] ACPI Warning: _SB.PR05._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.276996] ACPI Warning: _SB.PR06._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.277382] ACPI Warning: _SB.PR07._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.277776] ACPI Warning: _SB.PR08._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.278208] ACPI Warning: _SB.PR09._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.278604] ACPI Warning: _SB.PR10._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.278996] ACPI Warning: _SB.PR11._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.281769] ACPI Warning: _SB.PR12._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.285178] ACPI Warning: _SB.PR13._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.288551] ACPI Warning: _SB.PR14._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
[ 0.291916] ACPI Warning: _SB.PR15._CPC: Return Package type mismatch at index
24 - found Package, expected Integer/Buffer (20250807/nspredef-260)
However, in ACPI 6.6 spec, the index 24 entry is indeed a package :
Package
{
NumEntries, // Integer
Revision, // Integer
HighestPerformance, // Integer or Buffer (Resource Descriptor)
NominalPerformance, // Integer or Buffer (Resource Descriptor)
LowestNonlinearPerformance, // Integer or Buffer (Resource Descriptor)
LowestPerformance, // Integer or Buffer (Resource Descriptor)
GuaranteedPerformanceRegister, // Buffer (Resource Descriptor)
DesiredPerformanceRegister , // Buffer (Resource Descriptor)
MinimumPerformanceRegister , // Buffer (Resource Descriptor)
MaximumPerformanceRegister , // Buffer (Resource Descriptor)
PerformanceReductionToleranceRegister, // Buffer (Resource Descriptor)
TimeWindowRegister, // Buffer (Resource Descriptor)
CounterWraparoundTime, // Integer or Buffer (Resource Descriptor)
ReferencePerformanceCounterRegister, // Buffer (Resource Descriptor)
DeliveredPerformanceCounterRegister, // Buffer (Resource Descriptor)
PerformanceLimitedRegister, // Buffer (Resource Descriptor)
CPPCEnableRegister // Buffer (Resource Descriptor)
AutonomousSelectionEnable, // Integer or Buffer (Resource Descriptor)
AutonomousActivityWindowRegister, // Buffer (Resource Descriptor)
EnergyPerformancePreferenceRegister, // Buffer (Resource Descriptor)
ReferencePerformance // Integer or Buffer (Resource Descriptor)
LowestFrequency, // Integer or Buffer (Resource Descriptor)
NominalFrequency // Integer or Buffer (Resource Descriptor)
OSPMNominalPerformanceRegister, // Buffer (Resource Descriptor)
ResourcePriorityRegisters // Package <=== Index 24
}
https://uefi.org/specs/ACPI/6.6/08_Processor_Configuration_and_Control.html#cpc-continuous-performance-control
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