Essentially, Windows sends a "wake" or "sleep" signal to a piece of hardware, and when that hardware (or its driver) fails to respond within a specific timeframe, the system crashes to prevent data corruption.
is a common "Blue Screen of Death" (BSOD) error in Windows 10 and 11, formally known as Stop Code 0x0000009F . It typically occurs when a device driver fails to transition correctly between power states—most often when your PC is entering or waking from sleep, hibernation, or during shutdown.