https://bugzilla.kernel.org/show_bug.cgi?id=221556
Artem S. Tashkinov ([email protected]) changed: What |Removed |Added ---------------------------------------------------------------------------- Component|Other |ACPICA-Core Assignee|[email protected] |acpi_acpica-core@kernel-bug |.org |s.osdl.org --- Comment #2 from Artem S. Tashkinov ([email protected]) --- ChatGPT's assessment and reworked bug report: > AML accesses a valid SystemCMOS OperationRegion but Linux provides no > handler, causing periodic EC query failures and repeated ACPICA errors. Subject: ACPI: missing SystemCMOS OperationRegion handler causes repeated _Q33 failures On an HP OmniBook 7 (firmware F.12), Linux repeatedly logs ACPICA runtime errors originating from an EC query method: ```text ACPI Error: No handler for Region [CMS0] [SystemCMOS] ACPI Error: Region SystemCMOS (ID=5) has no handler ACPI Error: Aborting method \_SB.PC00.LPCB.EC0._Q33 due to previous error (AE_NOT_EXIST) ``` The issue repeats periodically during normal runtime. The DSDT defines: ```asl Scope (_SB.PC00.LPCB.RTC) { OperationRegion (CMS0, SystemCMOS, Zero, 0x40) Field (CMS0, ByteAcc, NoLock, Preserve) { RTSE, 8, RTSA, 8, RTMN, 8, RTMA, 8, RTHR, 8, RTHA, 8, RTDY, 8, RTDE, 8 } } ``` The failing `_Q33` method reads RTC values from this region: ```asl Method (_Q33, 0, NotSerialized) { Local0 = ^^RTC.RTMN Local1 = ^^RTC.RTHR Local2 = ^^RTC.RTDY Local3 = ^^RTC.RTSE ... } ``` It appears ACPICA/Linux does not provide a handler for the `SystemCMOS` address space (ID 5), causing AML execution to abort with `AE_NOT_EXIST`. Questions: * Is `SystemCMOS` support intentionally unimplemented in Linux ACPICA integration? * If so, should accesses be downgraded/rate-limited to avoid persistent log spam? * If not, is this a regression or missing handler implementation? -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
