UPDATE- Have to Disable Hyper-V to stop Event 137 Kernel Power Errors when exit sleep

glasskuter

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Windows 11 Pro 21H2 22000.438
I have no problem putting my PC to sleep nor do I have a problem waking it up. But every time I wake it, I get the following error in event viewer: Event 137 The system firmware has changed the processor's memory type range registers (MTRRs) across a sleep state transition (S4). This can result in reduced resume performance. I do not get any errors from a cold boot. I have the latest bios.

I don't know how long these errors have been happening as they went further back than the event log showed.

I can disable Hyper-V in bios and the event stops yet the details of this show nothing relating to hyper-v. The only reason I tried it is I ran across an obscure article where it was suggested.

Fast startup is not even an enabled feature, nor is hibernate.

The strange thing is Powercfg -a shows that sleep state S4 is not available. Only S3 is available, so I can’t understand why I continue to get S4 related events. The only thing that stands out to me is in bios, deep sleep is enabled in s4 and s5, yet the OS does not have s4 enabled.

Here is a link to my onedrive folder of screenshots and bios photos taken with my phone. I tried to zip them and post them here, but it kept saying the file is too large. I cropped them as much as I could. These bios options are what came on the PC from Dell. Y'all tell me what I'm missing here.
screenshots1

UPDATE 1/12/22 The workaround of disabling Hyper-V is no longer working and I am back to where I started. Event Viewer is flooded with these errors again. I have searched for some way to force this machine to use the S3 sleep state to no avail. Last night I performed a repair install which changed nothing. Despite S4 and hibernate not being available as an option, the system is still trying to use it.
 
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My Computers

System One System Two

  • OS
    Windows 11 Pro 21H2 22000.438
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 7080
    CPU
    i9-10900
    Memory
    32 gb
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    256 m.2 2230-256+1 tb hdd
    PSU
    500w
    Case
    MT
    Cooling
    Dell Premium
    Keyboard
    Logitech wired
    Mouse
    Logitech wireless
    Browser
    Firefox
    Antivirus
    Defender+MWB Premium
  • Operating System
    Windows 10 Pro 21H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 9020
    CPU
    i7-4770
    Memory
    24 gb
    Screen Resolution
    2560x1440
    Hard Drives
    256 gb Toshiba BG4 M.2 NVE SSB and 1 tb hdd
    PSU
    500w
    Case
    MT
    Cooling
    standard
    Mouse
    Logitech wireless
    Keyboard
    Logitech wired
    Antivirus
    Defender+MWB Premium
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