How to decode Kernel-Power Event 566 when waking from sleep

Question

On a Dell Vostro 3470 desktop running Windows-11 Pro 21H2 build 22000.795, while troubleshooting an issue related to waking up from sleep (yes S3 sleep, not Modern Standby, as this platform does not support S0) I encounter numerous events in Event Viewer > Windows Logs > System similar to this: The events in question are all Kernel-Power events with EventID 566 and descriptive text such as The system session has transitioned from xx to yy. The xx and yy differ, but yy is always one greater than xx.

As they are all Information events, I consider them non-critical. But I simply cannot find any information anywhere that can tell me what they mean. Although I have discovered this page, which enumerates and describes values from 0 through 7, the events I'm seeing routinely report values well above 7, as shown in the attached screen shot. And I've found no information anywhere regarding how to decode the associated Reason (in the above case, Reason 32.)

Can anyone provide any assistance in decoding these events, the meanings of xx and yy, and how to interpret values for Reason?

Answer 1

58 and 59 are just sequential session IDs that start at 0 on boot.

To get the power state of those sessions, see the Details tab.

+ System 
- EventData 
  BootId 47 
  Reason 20 
  PreviousSessionId 23 
  PreviousSessionType 3 
  PreviousSessionDurationInUs 122364356 
  PreviousEnergyCapacityAtStart 109 
  PreviousFullEnergyCapacityAtStart 40855 
  PreviousEnergyCapacityAtEnd 22361 
  PreviousFullEnergyCapacityAtEnd 41181 
  NextSessionId 24 
  NextSessionType 1 
  PowerStateAc true 
  MonitorReason 20 

PreviousSessionType 3 to NextSessionType 1 means waking from sleep state 2.

2: kd> dt _SYSTEM_POWER_STATE
nt!_SYSTEM_POWER_STATE
   PowerSystemUnspecified = 0n0
   PowerSystemWorking = 0n1
   PowerSystemSleeping1 = 0n2
   PowerSystemSleeping2 = 0n3
   PowerSystemSleeping3 = 0n4
   PowerSystemHibernate = 0n5
   PowerSystemShutdown = 0n6
   PowerSystemMaximum = 0n7