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S0 Low Power Idle (Modern Standby) and wake from sleep
Powercfg /a tells that the only supported sleep state is S0 Low Power Idle. That is a very confusing thing, I could not find satisfactory information by googling. Is that sleep state supposed to arm keyboard/mouse wakeup the exact same way than S3?
I see that if I force S3 (the HKLM\System\CurrentControlSet\Control\Power\PlatformAoAcOverride=0 trick), then sleep mode results in pulsating power button LED. However, when trying to wake from that state, not only keyboard/mouse doesn't work for wakeup, but also pressing the power button results in a crash. Fans turn on, power light turns permanently on, but nothing else happens, no image on the screen. Only holding power down (shutdown) will help at that point.
So in the S0 mode at least I can resume from sleep using power button, but I can't resume with keyboard/mouse. How do I troubleshoot this?
I tried maybe 15 different things already, nothing made any difference. When doing "powercfg /devicequery wake_armed" the keyboard and the mouse are listed. Also the laptop's integrated keyboard doesn't wake the computer and I have done "[x] Allow this device to wake the computer" everywhere I can think of.
Using Windows 10 version 21H1.
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If I insert an old mouse into the USB-A port directly on the laptop, and go to sleep, the mouse does light up (gets power). But no matter how many times I click the mouse, the computer doesn't wake up (and I made sure "[x] Allow this device to wake the computer" is enabled).
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I now tried to wake this computer by WOL (wake-on-lan). I know the magic packet goes through because "WOL - Magic Packet Sender" receives it went sent from another device. However, when sleeping, WOL won't wake it up either. (Wake on magic packet is enabled in the Ethernet adapter Advanced tab in Device Manager.)