Any progress on this?
My system will not sleep, activate screensaver, etc when LCDHost is active.
I used a powershell script to find out what the problem is using GetLastInputInfo and user32.dll. It turns out that LCDHost keeps sending the OS signals to indicate user is present, so the system never thinks it is idle. Idle counter is stopped. Exiting LCDHost immediately fixes the problem and starts the idle counter.
Script as below: rename to xxx.ps1, right click and select "run with powershell":
Add-Type @'
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace PInvoke.Win32 {
public static class UserInput {
[DllImport("user32.dll", SetLastError=false)]
private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
[StructLayout(LayoutKind.Sequential)]
private struct LASTINPUTINFO {
public uint cbSize;
public int dwTime;
}
public static DateTime LastInput {
get {
DateTime bootTime = DateTime.UtcNow.AddMilliseconds(-Environment.TickCount);
DateTime lastInput = bootTime.AddMilliseconds(LastInputTicks);
return lastInput;
}
}
public static TimeSpan IdleTime {
get {
return DateTime.UtcNow.Subtract(LastInput);
}
}
public static int LastInputTicks {
get {
LASTINPUTINFO lii = new LASTINPUTINFO();
lii.cbSize = (uint)Marshal.SizeOf(typeof(LASTINPUTINFO));
GetLastInputInfo(ref lii);
return lii.dwTime;
}
}
}
}
'@
while($true){
Start-Sleep -s 1
$Last = [PInvoke.Win32.UserInput]::LastInput
$Idle = [PInvoke.Win32.UserInput]::IdleTime
$LastStr = $Last.ToLocalTime().ToString("MM/dd/yyyy hh:mm:ss tt")
Write-Host ("Last user keyboard/mouse input: " + $LastStr)
Write-Host ("Idle for " + $Idle.Days + " days, " + $Idle.Hours + " hours, " + $Idle.Minutes + " minutes, " + $Idle.Seconds + " seconds.")
}
