Hi, I updated the firmware of Macbook Air Mid 2012 model to version 2.5. The changelog from Apple http://support.apple.com/kb/DL1592 "This update fixes an issue where Turbo Boost does not activate when using Boot Camp" indicates that they changed stuff on the ACPI tables. Now I have noticed that after updating the firmware the CPU frequency stays at 800 MHz even when compiling the kernel. I tried to debug what's going on. Here is my current results and I am kind of stuck how to proceed from here. Any ideas to go on from here? cheers, daniel And here the results: (complete logs and tables are here: http://www.monom.org/misc/acpi/ ) - When I change the governor to 'conservative' the CPU will be run eventually on max speed. - With lowering the threshold from 95 to 70, I see again clock speed changes echo 70 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold - The ACPI tables seem to have changed. Unfortunately, I have only retrieved the new one. I have an old dmesg output (3.6.0-rc6+) compared with new dmesg output (3.6.0-rc7+): Old: ACPI: RSDP 000000008ad8e014 00024 (v02 APPLE ) ACPI: XSDT 000000008ad8e1c0 000B4 (v01 APPLE Apple00 00000000 01000013) ACPI: FACP 000000008ad8c000 000F4 (v04 APPLE Apple00 00000000 Loki 0000005F) ACPI: DSDT 000000008ad82000 04708 (v01 APPLE MacBookA 00050001 INTL 20100915) ACPI: FACS 000000008ad1c000 00040 ACPI: HPET 000000008ad8b000 00038 (v01 APPLE Apple00 00000001 Loki 0000005F) ACPI: APIC 000000008ad8a000 000BC (v02 APPLE Apple00 00000001 Loki 0000005F) ACPI: SBST 000000008ad88000 00030 (v01 APPLE Apple00 00000001 Loki 0000005F) ACPI: ECDT 000000008ad87000 00053 (v01 APPLE Apple00 00000001 Loki 0000005F) ACPI: SSDT 000000008ad7f000 001EE (v01 APPLE SataAhci 00001000 INTL 20100915) ACPI: SSDT 000000008ad7e000 00024 (v01 APPLE SmcDppt 00001000 INTL 20100915) ACPI: SSDT 000000008ad78000 00D74 (v01 APPLE UsbSdPpt 00001000 INTL 20100915) ACPI: SSDT 000000008ad77000 00159 (v02 APPLE IGHda 00001000 INTL 20100915) ACPI: SSDT 000000008ad75000 00032 (v01 APPLE SsdtS3 00001000 INTL 20100915) ACPI: SSDT 000000008ad73000 015EB (v02 APPLE SsdtIGPU 00001000 INTL 20100915) ACPI: SSDT 000000008ad72000 00F0D (v01 APPLE PcieTbt 00001000 INTL 20100915) ACPI: SSDT 000000008ad6f000 006DB (v01 PmRef Cpu0Ist 00003000 INTL 20100915) ACPI: SSDT 000000008ad6e000 00B3D (v01 PmRef CpuPm 00003000 INTL 20100915) ACPI: SSDT 000000008ad6d000 00315 (v01 PmRef Cpu0Tst 00003000 INTL 20100915) ACPI: SSDT 000000008ad6c000 0037A (v01 PmRef ApTst 00003000 INTL 20100915) ACPI: DMAR 000000008ad6b000 000B8 (v01 APPLE IVB 00000001 AAPL 00000001) ACPI: MCFG 000000008ad89000 0003C (v01 APPLE Apple00 00000001 Loki 0000005F) New: ACPI: RSDP 000000008ad8e014 00024 (v02 APPLE ) ACPI: XSDT 000000008ad8e1c0 000B4 (v01 APPLE Apple00 00000000 01000013) ACPI: FACP 000000008ad8c000 000F4 (v04 APPLE Apple00 00000000 Loki 0000005F) ACPI: DSDT 000000008ad82000 04708 (v01 APPLE MacBookA 00050001 INTL 20100915) ACPI: FACS 000000008ad1c000 00040 ACPI: HPET 000000008ad8b000 00038 (v01 APPLE Apple00 00000001 Loki 0000005F) ACPI: APIC 000000008ad8a000 000BC (v02 APPLE Apple00 00000001 Loki 0000005F) ACPI: SBST 000000008ad88000 00030 (v01 APPLE Apple00 00000001 Loki 0000005F) ACPI: ECDT 000000008ad87000 00053 (v01 APPLE Apple00 00000001 Loki 0000005F) ACPI: SSDT 000000008ad7f000 001EE (v01 APPLE SataAhci 00001000 INTL 20100915) ACPI: SSDT 000000008ad7e000 00024 (v01 APPLE SmcDppt 00001000 INTL 20100915) ACPI: SSDT 000000008ad78000 00D74 (v01 APPLE UsbSdPpt 00001000 INTL 20100915) ACPI: SSDT 000000008ad77000 00159 (v02 APPLE IGHda 00001000 INTL 20100915) ACPI: SSDT 000000008ad75000 00032 (v01 APPLE SsdtS3 00001000 INTL 20100915) ACPI: SSDT 000000008ad73000 015EB (v02 APPLE SsdtIGPU 00001000 INTL 20100915) ACPI: SSDT 000000008ad72000 00F0D (v01 APPLE PcieTbt 00001000 INTL 20100915) ACPI: SSDT 000000008ad6f000 00615 (v01 PmRef Cpu0Ist 00003000 INTL 20100915) ACPI: SSDT 000000008ad6e000 00B3D (v01 PmRef CpuPm 00003000 INTL 20100915) ACPI: SSDT 000000008ad6d000 00315 (v01 PmRef Cpu0Tst 00003000 INTL 20100915) ACPI: SSDT 000000008ad6c000 0037A (v01 PmRef ApTst 00003000 INTL 20100915) ACPI: DMAR 000000008ad6b000 00088 (v01 APPLE IVB 00000001 AAPL 00000001) ACPI: MCFG 000000008ad89000 0003C (v01 APPLE Apple00 00000001 Loki 0000005F) The first PmRef has changed in size. The rest looks pretty the same. So here is the disassembly of this table. /* * Intel ACPI Component Architecture * AML Disassembler version 20100528 * * Disassembly of SSDT8.dat, Wed Oct 10 15:24:22 2012 * * * Original Table Header: * Signature "SSDT" * Length 0x00000615 (1557) * Revision 0x01 * Checksum 0xC0 * OEM ID "PmRef" * OEM Table ID "Cpu0Ist" * OEM Revision 0x00003000 (12288) * Compiler ID "INTL" * Compiler Version 0x20100915 (537921813) */ DefinitionBlock ("SSDT8.aml", "SSDT", 1, "PmRef", "Cpu0Ist", 0x00003000) { External (PDC0) External (TCNT, IntObj) External (CPLT, IntObj) External (\_PR_.CPU0, DeviceObj) Scope (\_PR.CPU0) { Method (_PPC, 0, NotSerialized) { Return (CPLT) } Name (_PCT, Package (0x02) { ResourceTemplate () { Register (FFixedHW, 0x10, // Bit Width 0x00, // Bit Offset 0x0000000000000199, // Address ,) }, ResourceTemplate () { Register (FFixedHW, 0x10, // Bit Width 0x00, // Bit Offset 0x0000000000000198, // Address ,) } }) Name (_PSS, Package (0x0E) { Package (0x06) { 0x000007D1, 0x00004268, 0x0000000A, 0x0000000A, 0x00002000, 0x00002000 }, Package (0x06) { 0x000007D0, 0x00004268, 0x0000000A, 0x0000000A, 0x00001400, 0x00001400 }, Package (0x06) { 0x0000076C, 0x00003E5E, 0x0000000A, 0x0000000A, 0x00001300, 0x00001300 }, Package (0x06) { 0x00000708, 0x00003A69, 0x0000000A, 0x0000000A, 0x00001200, 0x00001200 }, Package (0x06) { 0x000006A4, 0x00003688, 0x0000000A, 0x0000000A, 0x00001100, 0x00001100 }, Package (0x06) { 0x00000640, 0x000032BA, 0x0000000A, 0x0000000A, 0x00001000, 0x00001000 }, Package (0x06) { 0x000005DC, 0x00002F01, 0x0000000A, 0x0000000A, 0x00000F00, 0x00000F00 }, Package (0x06) { 0x00000578, 0x00002B5E, 0x0000000A, 0x0000000A, 0x00000E00, 0x00000E00 }, Package (0x06) { 0x00000514, 0x000027CB, 0x0000000A, 0x0000000A, 0x00000D00, 0x00000D00 }, Package (0x06) { 0x000004B0, 0x0000244C, 0x0000000A, 0x0000000A, 0x00000C00, 0x00000C00 }, Package (0x06) { 0x0000044C, 0x000020E1, 0x0000000A, 0x0000000A, 0x00000B00, 0x00000B00 }, Package (0x06) { 0x000003E8, 0x00001D88, 0x0000000A, 0x0000000A, 0x00000A00, 0x00000A00 }, Package (0x06) { 0x00000384, 0x00001A43, 0x0000000A, 0x0000000A, 0x00000900, 0x00000900 }, Package (0x06) { 0x00000320, 0x00001710, 0x0000000A, 0x0000000A, 0x00000800, 0x00000800 } }) Name (APSS, Package (0x19) { Package (0x06) { 0x00000C80, 0x00004268, 0x0000000A, 0x0000000A, 0x00002000, 0x00002000 }, Package (0x06) { 0x00000C1C, 0x00004268, 0x0000000A, 0x0000000A, 0x00001F00, 0x00001F00 }, Package (0x06) { 0x00000BB8, 0x00004268, 0x0000000A, 0x0000000A, 0x00001E00, 0x00001E00 }, Package (0x06) { 0x00000B54, 0x00004268, 0x0000000A, 0x0000000A, 0x00001D00, 0x00001D00 }, Package (0x06) { 0x00000AF0, 0x00004268, 0x0000000A, 0x0000000A, 0x00001C00, 0x00001C00 }, Package (0x06) { 0x00000A8C, 0x00004268, 0x0000000A, 0x0000000A, 0x00001B00, 0x00001B00 }, Package (0x06) { 0x00000A28, 0x00004268, 0x0000000A, 0x0000000A, 0x00001A00, 0x00001A00 }, Package (0x06) { 0x000009C4, 0x00004268, 0x0000000A, 0x0000000A, 0x00001900, 0x00001900 }, Package (0x06) { 0x00000960, 0x00004268, 0x0000000A, 0x0000000A, 0x00001800, 0x00001800 }, Package (0x06) { 0x000008FC, 0x00004268, 0x0000000A, 0x0000000A, 0x00001700, 0x00001700 }, Package (0x06) { 0x00000898, 0x00004268, 0x0000000A, 0x0000000A, 0x00001600, 0x00001600 }, Package (0x06) { 0x00000834, 0x00004268, 0x0000000A, 0x0000000A, 0x00001500, 0x00001500 }, Package (0x06) { 0x000007D0, 0x00004268, 0x0000000A, 0x0000000A, 0x00001400, 0x00001400 }, Package (0x06) { 0x0000076C, 0x00003E5E, 0x0000000A, 0x0000000A, 0x00001300, 0x00001300 }, Package (0x06) { 0x00000708, 0x00003A69, 0x0000000A, 0x0000000A, 0x00001200, 0x00001200 }, Package (0x06) { 0x000006A4, 0x00003688, 0x0000000A, 0x0000000A, 0x00001100, 0x00001100 }, Package (0x06) { 0x00000640, 0x000032BA, 0x0000000A, 0x0000000A, 0x00001000, 0x00001000 }, Package (0x06) { 0x000005DC, 0x00002F01, 0x0000000A, 0x0000000A, 0x00000F00, 0x00000F00 }, Package (0x06) { 0x00000578, 0x00002B5E, 0x0000000A, 0x0000000A, 0x00000E00, 0x00000E00 }, Package (0x06) { 0x00000514, 0x000027CB, 0x0000000A, 0x0000000A, 0x00000D00, 0x00000D00 }, Package (0x06) { 0x000004B0, 0x0000244C, 0x0000000A, 0x0000000A, 0x00000C00, 0x00000C00 }, Package (0x06) { 0x0000044C, 0x000020E1, 0x0000000A, 0x0000000A, 0x00000B00, 0x00000B00 }, Package (0x06) { 0x000003E8, 0x00001D88, 0x0000000A, 0x0000000A, 0x00000A00, 0x00000A00 }, Package (0x06) { 0x00000384, 0x00001A43, 0x0000000A, 0x0000000A, 0x00000900, 0x00000900 }, Package (0x06) { 0x00000320, 0x00001710, 0x0000000A, 0x0000000A, 0x00000800, 0x00000800 } }) Name (APSN, 0x0C) Name (APLF, 0x00) Name (PSDF, 0x00) Method (_PSD, 0, NotSerialized) { If (LNot (PSDF)) { Store (TCNT, Index (DerefOf (Index (HPSD, 0x00)), 0x04)) Store (TCNT, Index (DerefOf (Index (SPSD, 0x00)), 0x04)) Store (Ones, PSDF) } If (And (PDC0, 0x0800)) { Return (HPSD) } Return (SPSD) } Name (HPSD, Package (0x01) { Package (0x05) { 0x05, 0x00, 0x00, 0xFE, 0x80 } }) Name (SPSD, Package (0x01) { Package (0x05) { 0x05, 0x00, 0x00, 0xFC, 0x80 } }) } } -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
