My XPS13 laptop is unhappy with something recent. As of yesterday, I get this at bootup: ACPI: Added _OSI(Module Device) ACPI: Added _OSI(Processor Device) ACPI: Added _OSI(3.0 _SCP Extensions) ACPI: Added _OSI(Processor Aggregator Device) ACPI: Added _OSI(Linux-Dell-Video) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI Error: Result stack is empty! State=(____ptrval____) (20180531/dswstate-65) ACPI Error: AE_AML_NO_RETURN_VALUE, Missing or null operand (20180531/dsutils-612) ACPI Error: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20180531/dsutils-727) ACPI: 9 ACPI AML tables successfully acquired and loaded It does *not* happen in Linux version 4.18.0-rc6-00110-g6e77b267723c but it *does* happen in Linux version 4.18.0-rc6-00152-gcd3f77d74ac3 and while I didn't bisect it, I'm assuming it's due to 73c2a01c52b6 ("ACPICA: AML Parser: ignore dispatcher error status during table load") Ideas? Note only the errors are new. On older kernels, I just get: ACPI: Added _OSI(Module Device) ACPI: Added _OSI(Processor Device) ACPI: Added _OSI(3.0 _SCP Extensions) ACPI: Added _OSI(Processor Aggregator Device) ACPI: Added _OSI(Linux-Dell-Video) ACPI: 9 ACPI AML tables successfully acquired and loaded without the big slew of errors. Linus -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html