Debugging sleep issues…

A lot of people are still facing sleep/wake related issues and I like to figure out why so please check:

IOService:/AppleACPIPlatformExpert/IOPMrootDomain/PMStatusCode

1.) Is that number a zero or some other value?
2.) Do you have a property with the name: IOPMDeepIdleSupported?
3.) Do you have a property with the name: IOPMSystemSleepType?

If the answer for the first question is zero, then I would like to know if you are using a dGPU or IGPU only.

The second question can be solved by adding the following code to your ACPI tables:

Scope (\_SB)
{
    Method (LPS0, 0, NotSerialized)
    {
        Store ("Method \\_SB._LPS0 Called", Debug)
        Return (One)
    }
}

Scope (\_GPE)
{
    Method (LXEN, 0, NotSerialized)
    {
        Store ("Method \\_GPE.LXEN Called", Debug)
        Return (One)
    }
}

If the answer for the last question is yes, then what value is it, and what SMBIOS are you using? Please note that this specific property is not part of Yosemite. The value represents the lowest possible sleep state and is checked by the following kexts:

AppleACPIPlatform.kext
AppleIntelBDWGraphicsFramebuffer.kext
AppleIntelFramebufferAzul.kext
AppleIntelSKLGraphicsFramebuffer.kext
AppleSDXC.kext
AppleStorageDrivers.kext
IO80211Family.kext
IOBluetoothFamily.kext
IONVMeFamily.kext
IOUSBAttachedSCSI.kext
IOUSBMassStorageDriver.kext

That should be enough reasons for you to want that property.

I also added the following code to my ACPI tables:

Scope (\)
{
   Name (SLTP, Zero)

   Method (_TTS, 1, NotSerialized)
   {
       Store ("Method \\__TTS Called", Debug)
       Store (Arg0, SLTP)
   }
}

This, with additional checks, is used by Apple to skip parts for the NVMe SSD (RP01/IOPP/SSD0@0), AirPort (RP09/IOPP/ARP@0) and camera (RP10@1D,1/IOPP/CMRA) devices

NVRAM

There are two interesting NVRAM properties:

#define kIOSleepWakeDebugKey        "Persistent-memory-note"
#define kIOEFIBootRomFailureKey     "wake-failure"

That has to be it for now. Maybe later more…

Edit:

Ok. Jaybee asked (see comments) how he should validate the values. That is a good question. Let’s start with PMStatusCode. This should be 0x0 (success).

IOPMDeepIdleSupported. This should be there with a value of true.

IOPMSystemSleepType is the lowest possible sleep state and this is set to 7 on my MacBook Pro. This will also issue a sleep request for the iGPU.

Some people said that this property wasn’t there on their setup. For some not until after a sleep/wake cycle, and then it was set to 2.

I have yet to figure out how important this value is and if that can cause any trouble.