On my Thinkpad T460P I always get several ACPI errors in the journalctl running the 5.4 LTS kernel Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Added _OSI(Module Device) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Added _OSI(Processor Device) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Added _OSI(3.0 _SCP Extensions) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Added _OSI(Processor Aggregator Device) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Added _OSI(Linux-Dell-Video) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: 10 ACPI AML tables successfully acquired and loaded Sep 25 11:18:46 deus-ex-machina kernel: ACPI: EC: EC started Sep 25 11:18:46 deus-ex-machina kernel: ACPI: EC: interrupt blocked Sep 25 11:18:46 deus-ex-machina kernel: ACPI: \: Used as first EC Sep 25 11:18:46 deus-ex-machina kernel: ACPI: \: GPE=0x16, EC_CMD/EC_SC=0x66, EC_DATA=0x62 Sep 25 11:18:46 deus-ex-machina kernel: ACPI: EC: Boot ECDT EC used to handle transactions Sep 25 11:18:46 deus-ex-machina kernel: ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Dynamic OEM Table Load: Sep 25 11:18:46 deus-ex-machina kernel: ACPI: SSDT 0xFFFF94661D15A800 000649 (v02 PmRef Cpu0Ist 00003000 INTL 20141107) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Failure creating named object [\_PR.CPU0._PPC], AE_ALREADY_EXISTS (20190816/dswload2-326) Sep 25 11:18:46 deus-ex-machina kernel: fbcon: Taking over console Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190816/psobject-220) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Skipping parse of AML opcode: Method (0x0014) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Failure creating named object [\_PR.CPU0._PCT], AE_ALREADY_EXISTS (20190816/dswload2-326) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190816/psobject-220) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Skipping parse of AML opcode: Method (0x0014) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Failure creating named object [\_PR.CPU0._PSS], AE_ALREADY_EXISTS (20190816/dswload2-326) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190816/psobject-220) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Skipping parse of AML opcode: Method (0x0014) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Failure creating named object [\_PR.CPU0.LPSS], AE_ALREADY_EXISTS (20190816/dswload2-326) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190816/psobject-220) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Failure creating named object [\_PR.CPU0.TPSS], AE_ALREADY_EXISTS (20190816/dswload2-326) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190816/psobject-220) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Failure creating named object [\_PR.CPU0.PSDF], AE_ALREADY_EXISTS (20190816/dswload2-326) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190816/psobject-220) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Failure creating named object [\_PR.CPU0._PSD], AE_ALREADY_EXISTS (20190816/dswload2-326) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190816/psobject-220) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Skipping parse of AML opcode: Method (0x0014) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Failure creating named object [\_PR.CPU0.HPSD], AE_ALREADY_EXISTS (20190816/dswload2-326) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190816/psobject-220) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Failure creating named object [\_PR.CPU0.SPSD], AE_ALREADY_EXISTS (20190816/dswload2-326) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190816/psobject-220) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: \_PR_.CPU0: _OSC native thermal LVT Acked Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Dynamic OEM Table Load: Sep 25 11:18:46 deus-ex-machina kernel: ACPI: SSDT 0xFFFF94661D141800 0003CF (v02 PmRef Cpu0Cst 00003001 INTL 20141107) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Dynamic OEM Table Load: Sep 25 11:18:46 deus-ex-machina kernel: ACPI: SSDT 0xFFFF94661D1A8000 00008E (v02 PmRef Cpu0Hwp 00003000 INTL 20141107) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Dynamic OEM Table Load: Sep 25 11:18:46 deus-ex-machina kernel: ACPI: SSDT 0xFFFF94661D151C00 000130 (v02 PmRef HwpLvt 00003000 INTL 20141107) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Dynamic OEM Table Load: Sep 25 11:18:46 deus-ex-machina kernel: ACPI: SSDT 0xFFFF94661D236800 0005AA (v02 PmRef ApIst 00003000 INTL 20141107) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Dynamic OEM Table Load: Sep 25 11:18:46 deus-ex-machina kernel: ACPI: SSDT 0xFFFF94661D150400 000119 (v02 PmRef ApHwp 00003000 INTL 20141107) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Dynamic OEM Table Load: Sep 25 11:18:46 deus-ex-machina kernel: ACPI: SSDT 0xFFFF94661D21F200 000119 (v02 PmRef ApCst 00003000 INTL 20141107) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Interpreter enabled Sep 25 11:18:46 deus-ex-machina kernel: ACPI: (supports S0 S3 S4 S5) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Using IOAPIC for interrupt routing Sep 25 11:18:46 deus-ex-machina kernel: PCI: MMCONFIG for domain 0000 [bus 00-3f] at [mem 0xf8000000-0xfbffffff] (base 0xf8000000) Sep 25 11:18:46 deus-ex-machina kernel: PCI: MMCONFIG at [mem 0xf8000000-0xfbffffff] reserved in ACPI motherboard resources Sep 25 11:18:46 deus-ex-machina kernel: PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Enabled 5 GPEs in block 00 to 7F Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Power Resource [PUBS] (on) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Power Resource [PG00] (on) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Power Resource [PG01] (on) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Power Resource [PG02] (on) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 *10 11) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 *11) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 *11) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 *11) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 *11) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 9 10 11) *0, disabled. Sep 25 11:18:46 deus-ex-machina kernel: ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 9 10 *11) Sep 25 11:18:46 deus-ex-machina kernel: ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-80]) Sep 25 11:18:46 deus-ex-machina kernel: acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI HPX-Type3] Sep 25 11:18:46 deus-ex-machina kernel: acpi PNP0A08:00: _OSC: platform does not support [SHPCHotplug PCIeCapability LTR] Sep 25 11:18:46 deus-ex-machina kernel: acpi PNP0A08:00: _OSC: not requesting control; platform does not support [PCIeCapability] Sep 25 11:18:46 deus-ex-machina kernel: acpi PNP0A08:00: _OSC: OS requested [PCIeHotplug SHPCHotplug PME AER PCIeCapability LTR] Sep 25 11:18:46 deus-ex-machina kernel: acpi PNP0A08:00: _OSC: platform willing to grant [PCIeHotplug PME AER] Sep 25 11:18:46 deus-ex-machina kernel: acpi PNP0A08:00: _OSC failed (AE_SUPPORT); disabling ASPM Sep 25 11:18:46 deus-ex-machina kernel: acpi PNP0A08:00: [Firmware Info]: MMCONFIG for domain 0000 [bus 00-3f] only partially covers this bridge Sep 25 11:18:46 deus-ex-machina kernel: intel_idle: MWAIT substates: 0x11142120 Sep 25 11:18:46 deus-ex-machina kernel: intel_idle: v0.4.1 model 0x5E Sep 25 11:18:46 deus-ex-machina kernel: intel_idle: lapic_timer_reliable_states 0xffffffff Sep 25 11:18:46 deus-ex-machina kernel: input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input0 Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Lid Switch [LID] Sep 25 11:18:46 deus-ex-machina kernel: input: Sleep Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input1 Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Sleep Button [SLPB] Sep 25 11:18:46 deus-ex-machina kernel: input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input2 Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Power Button [PWRF] Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU1._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU2._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU3._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU4._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU5._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU6._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU7._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: thermal LNXTHERM:00: registered as thermal_zone0 Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Thermal Zone [THM0] (50 C) Sep 25 11:18:46 deus-ex-machina kernel: intel_idle: MWAIT substates: 0x11142120 Sep 25 11:18:46 deus-ex-machina kernel: intel_idle: v0.4.1 model 0x5E Sep 25 11:18:46 deus-ex-machina kernel: intel_idle: lapic_timer_reliable_states 0xffffffff Sep 25 11:18:46 deus-ex-machina kernel: input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input0 Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Lid Switch [LID] Sep 25 11:18:46 deus-ex-machina kernel: input: Sleep Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input1 Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Sleep Button [SLPB] Sep 25 11:18:46 deus-ex-machina kernel: input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input2 Sep 25 11:18:46 deus-ex-machina kernel: ACPI: Power Button [PWRF] Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU1._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU2._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU3._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU4._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU5._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU6._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC.CPC1], AE_NOT_FOUND (20190816/psargs-330) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU0._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529) Sep 25 11:18:46 deus-ex-machina kernel: ACPI Error: Aborting method \_PR.CPU7._CPC due to previous error (AE_NOT_FOUND) (20190816/psparse-529)
Most of these errors are related with buggy BIOS code, which we will not fix in kernel. Bug closed first. Please feel free to reopen it if there are some functionality issues that are related with these ACPI errors.