My laptop has demonstrated some weird sleep/suspend issues a few times. In this case, it refused to wake from sleep (power button LED pulsing slowly). I was forced to hold the power button until it shut off, and then power it back up again. I grabbed
powercfg /SleepStudy immediately upon logging in.
We can see that the laptop went into “screen off” at 19:50, but it seems to be missing a sleep event. The laptop was closed from that time forward, until I opened the lid and attempted to wake the machine around 02:11. When it didn’t immediately wake, I suspected maybe it was in some sort of hibernation mode, so I pressed the button and waited for minutes with the laptop plugged in (suspecting the battery had depleted). I eventually gave up and performed the force shutdown.
We can see some sort of “No CS Phase” event occur, though there are no obvious culprits explaining why it took 11 minutes for it to complete.
Any ideas why my laptop was apparently in a non-sleep screen off phase for hours, yet would not wake later? Perhaps I’m missing something in the powercfg report; I’m happy to share the entire document here if that will help with diagnosis.