On 1/29/2023 12:12 AM, MajorLanGod wrote:
A while back someone posted a command I can use to see what is keeping my Win11 system from turning my screen off after it has been idle for a while.
I can't find my notes, could someone tell me again please?
Administrator terminal
powercfg /energy
Output 60 seconds later = C:\users\myname\energy-report.html
Open that file in your web browser. Here, I use VLC as an example. VLC would make requests.
System Availability Requests:System Required Request
The program has made a request to prevent the system from automatically entering sleep.
Requesting Process \Device\HarddiskVolume3\Program Files\VideoLAN\VLC\vlc.exe
System Availability Requests:Display Required Request
The program has made a request to prevent the display from automatically entering a low-power mode.
Requesting Process \Device\HarddiskVolume3\Program Files\VideoLAN\VLC\vlc.exe
These correspond to a call to the kernel, which requests
special properties for a media player. They want VLC to remain alive
from a compute point of view, and remain alive with respect to the display. Note that an audio application, can also want to keep the display open,
if for example the sounds play through the HDMI LCD monitor speakers.
SetThreadExecutionState (kernel32) <=== what a program uses, to keep machine awake...
[FlagsAttribute]
public enum EXECUTION_STATE :uint
{
ES_AWAYMODE_REQUIRED = 0x00000040,
ES_CONTINUOUS = 0x80000000, <=== computer cannot sleep, while 2 hour movie plays
ES_DISPLAY_REQUIRED = 0x00000002, <=== display cannot go black while movie plays
ES_SYSTEM_REQUIRED = 0x00000001
// Legacy flag, should not be used.
// ES_USER_PRESENT = 0x00000004
}
This feature eliminates the need for "mouse jiggling".
Simply review the energy report for examples like the above for VLC.
Paul
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