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- Oct 22, 2013
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After upgrading from El Cap to Sierra, the ssdtPRGen created power management SSDT I've been using since Yosemite is no longer working on my Acer. I had problems with CPU power management when I was originally setting up this computer, likely because of the U processor, but after using MacBookAir5,1 system def and enabling XCPM mode at boot, I was able to get it working with ssdPRGen using Ivy-Bridge workaround 2, and XCPM mode.
On boot with the original ssdt, I get the following Kernel panic:
without the ssdt, Sierra boots fine.
I've tried downloading a more current version of ssdtPRGen, and reran it with -w 2 and -x 1, and while it no longer panics, I get no stepping: processor is locked at 800mhz.
Any ideas on what I can do to get power management working again?
On boot with the original ssdt, I get the following Kernel panic:
Code:
*** Panic Report ***
panic(cpu 2 caller 0xffffff7fae6cf64b): P-State Stepper Error 18 at step 29 in context 2 on CPU 2
Backtrace (CPU 2), Frame : Return Address
0xffffff921867b810 : 0xffffff802c0f748c
0xffffff921867b890 : 0xffffff7fae6cf64b
0xffffff921867b8c0 : 0xffffff7fae6cb822
0xffffff921867b980 : 0xffffff7fae6cc4ea
0xffffff921867b9f0 : 0xffffff7fae6cf3ea
0xffffff921867ba20 : 0xffffff802c215241
0xffffff921867bb20 : 0xffffff7fae6c291e
0xffffff921867bb90 : 0xffffff7fae6c2758
0xffffff921867bbc0 : 0xffffff7fae959f56
0xffffff921867bc10 : 0xffffff802c6c00ba
0xffffff921867bc80 : 0xffffff7fae95989d
0xffffff921867bd40 : 0xffffff7fae95a076
0xffffff921867bd80 : 0xffffff802c699d7e
0xffffff921867bdd0 : 0xffffff802c6a2692
0xffffff921867be10 : 0xffffff7fae95926b
0xffffff921867be40 : 0xffffff802c69bdcd
0xffffff921867be80 : 0xffffff802c69bb1e
0xffffff921867bf10 : 0xffffff802c69b0d6
0xffffff921867bf60 : 0xffffff802c69caee
0xffffff921867bfb0 : 0xffffff802c0a6af7
Kernel Extensions in backtrace:
com.apple.driver.AppleIntelCPUPowerManagement(219.0)[36216E26-C378-3067-B5B5-C27076D64955]@0xffffff7fae6b6000->0xffffff7fae6e0fff
com.apple.driver.X86PlatformShim(1.0)[49CF8C0A-C2D1-356C-8127-805E4B2433D1]@0xffffff7fae958000->0xffffff7fae95ffff
dependency: com.apple.driver.IOPlatformPluginFamily(6.0.0d8)[09B480A4-4793-311C-B5CF-4C56A3C67D18]@0xffffff7fad993000
dependency: com.apple.driver.X86PlatformPlugin(1.0.0)[314B16BB-0DF9-3FF0-9416-961E762C882A]@0xffffff7fae93d000
dependency: com.apple.driver.AppleSMC(3.1.9)[FA8E2E8A-FA5B-3949-AA1D-946DE5F5217B]@0xffffff7fad9b6000
BSD process name corresponding to current thread: kernel_task
Boot args: -v dart=0 -xcpm
Mac OS version:
16A323
Kernel version:
Darwin Kernel Version 16.0.0: Mon Aug 29 17:56:20 PDT 2016; root:xnu-3789.1.32~3/RELEASE_X86_64
Kernel UUID: 622D2470-C34D-31F9-A62B-6AA9A3C6A3CD
Kernel slide: 0x000000002be00000
Kernel text base: 0xffffff802c000000
__HIB text base: 0xffffff802bf00000
System model name: MacBookAir5,1 (Mac-66F35F19FE2A0D05)
System uptime in nanoseconds: 11002318059
last loaded kext at 10061407158: com.apple.driver.X86PlatformShim 1.0.0 (addr 0xffffff7fae958000, size 32768)
loaded kexts:
org.tw.CodecCommander 2.6.2
com.intel.driver.EnergyDriver 2.0
com.rehabman.driver.IntelBacklight 1.0.10
org.emlydinesh.driver.ApplePS2SmartTouchPad 4.6
org.emlydinesh.driver.ApplePS2Keyboard 4.6
org.rehabman.driver.FakePCIID.XHCIMux 1.3.2
org.rehabman.driver.FakePCIID 1.3.2
org.emlydinesh.driver.ApplePS2Controller 4.6
com.rehabman.driver.USBInjectAll 0.5.12
org.netkas.driver.FakeSMC 1723
org.rehabman.driver.AppleSmartBatteryManager 1.70.1
<snip>
I've tried downloading a more current version of ssdtPRGen, and reran it with -w 2 and -x 1, and while it no longer panics, I get no stepping: processor is locked at 800mhz.
Any ideas on what I can do to get power management working again?