Windows 10: External Monitor Via HDMI Won't Turn on After Waking Up From Sleep/Hibernation/Reboot

Discus and support External Monitor Via HDMI Won't Turn on After Waking Up From Sleep/Hibernation/Reboot in Windows 10 Drivers and Hardware to solve the problem; Dear Sir/Madam, I hope you are safe and well. Summary: External monitor connected to laptop's HDMI port will not turn on/receive video input... Discussion in 'Windows 10 Drivers and Hardware' started by SimonSaysGiveMeSmile, Apr 18, 2021.

  1. External Monitor Via HDMI Won't Turn on After Waking Up From Sleep/Hibernation/Reboot


    Dear Sir/Madam,


    I hope you are safe and well.


    Summary:

    External monitor connected to laptop's HDMI port will not turn on/receive video input after awakening from sleep/hibernation or sometimes reboot. the monitor will turn on after unplugging and reconnecting. The monitor was working fine with another laptop prior to the current one, thus it should be the laptop's issue.


    Setup:

    Laptop: Lenovo IdeaPad 7 Slim GTX. It has a dedicated GTX 1650 graphics.

    Monitor: MSI MAG322CQR. It is a 1440P monitor running at 144 Hz.

    Old Laptop that Worked: Lenovo LEGION Y530. It has a dedicated GTX 1050 graphics.

    System: Windows 10 Home 20H2

    All power adapters and cables are OEM.


    Attempted Solutions:

    1. Windows 10 Troubleshooter --- Found no error

    2. Updating all related drivers battery, display adapter, BIOS, etc. --- Made no difference

    3. Change settings in the power options The PCI-E was not available first, so I have to add it through registry --- Made no difference

    4. Try to add additional power plans through elevated command prompt High Performance, Ultra High Performance --- Failed to add as it might be intentionally disabled by Lenovo.

    5. Try to change "CsEnabled" Registry to "0" Path: "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power", have to create a new DWORD file --- Made no difference

    6. Try to add "Attributes: DWORD =2 file in every "PowerSettings" 's subfolders so they can show up in "power options advanced settings", as shown below:

    External Monitor Via HDMI Won't Turn on After Waking Up From Sleep/Hibernation/Reboot 82b803e2-0ff9-4210-90f8-7e46e494937a?upload=true.png

    --- Nothing has changed in the advanced power options menu.

    Perhaps it doesn't need to be this complex, so I thought, and

    7. Changed PhysX to Auto-Select, CPU and Dedicated Graphics --- Mode no difference


    I am really out of ideas and frustrated --- am I missing something here? Please help me, thanks a million!


    Fine regards,


    Simon T

    :)
     
    SimonSaysGiveMeSmile, Apr 18, 2021
    #1

  2. my computer won`t wake up after goes to sleep

    these computer won`t wake up after goes to sleep ?
     
    oscarperezvc, Apr 18, 2021
    #2
  3. Using laptop as desktop - can't wake it from sleep with wireless mouse or keyboard.

    • 4. Test waking from Sleep with the monitor connected to the laptop.
    • 5. Disconnect the monitor from the laptop, reboot, then test waking from Sleep without an external monitor.

    No luck with monitor connected. Disconnected the monitor, rebooted, then tested wake-from-sleep with no external monitor - no luck.
     
    eljaycanuck, Apr 18, 2021
    #3
  4. claylomax Win User

    External Monitor Via HDMI Won't Turn on After Waking Up From Sleep/Hibernation/Reboot

    Shutting down, hibernating, or sleeping?

    I only get hibernate and allow wake timers not allow hybrid sleep.
     
    claylomax, Apr 18, 2021
    #4
Thema:

External Monitor Via HDMI Won't Turn on After Waking Up From Sleep/Hibernation/Reboot

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