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I have (I think) a standard sleep / turn off display settings in my Windows 10:

enter image description here

Yet my computer turns off display after 30 seconds since locking the computer.

If I lock computer manually, display's power is cut-off (display is turned off) after just 30 seconds since lock / stop of work. If I stop the work, but do not lock the computer then Windows locks it up after two minutes and then turns off the display after another 30 seconds.

To summarize: My display is never turned of after 15 minutes, despite above settings, it lasts turned on for between 30 seconds and 150 seconds at most.

How can I control when my display for locked computer is turned off, or how can I enforce that my display will always be turned of -- as set / said -- after 15 minutes and not even a second earlier?

Edit: I went through all advanced power settings etc., all for nothing -- everything I look or check, I can clearly see the same setting -- 15 minutes. I must be looking in an incorrect place, though.

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    If you've exhausted your Advanced Power Settings, try going to Personalize, then Lock screen, and checking your Screen saver settings. There's a chance your computer is hitting that default one minute wait time on a blank screen saver. Check the box for On resume, display logon screen and change your wait time to the 15 minutes you're aiming for.
    – mael'
    Jun 21, 2019 at 14:48

1 Answer 1

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Open the Registry Editor, either by pressing Win+R, then type regedit in the Run dialog and hit enter, or simply typing "regedit" in Windows Start.

  1. In the Registry go to the following key:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\7516b95f-f776-4464-8c53-06167f40cc99\8EC4B3A5-6868-48c2-BE75-4F3044BE88A7
    

    and set the Attributes DWORD value from 1 to 2

    Screenshot of Window titled Registry Editor

  2. Goto Power Options > Change plan settings > Change advanced power settings

    Screenshot of Window titled Power Options

    Screenshot of Window titled Edit Plan Settings

  3. In the Power Options dialog now you can see a new setting under Display > Console lock display off timeout

    Screenshot of Window Dialog titled Power Options

    Change the default time of 1 minute to the time you want, in minutes.

At any time, you can revert the changes by switching the registry value key (shown above) from 2 back to 1.

Source: https://www.windowscentral.com/how-extend-lock-screen-timeout-display-turn-windows-10

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