Diagnosing bugs preventing sleep on Windows

a year ago

Diagnosing programs preventing Windows auto-lock and sleep is straightforward using breakpoints and Windows APIs.
The issue was traced to a hidden dialog in a CEF-based application that kept a power request active, preventing the lock screen and sleep mode.
Tools like `powercfg`, `pwrtest`, and ETW with the Microsoft-Windows-Kernel-Power provider can help monitor and diagnose power requests.
The bug was fixed after identifying the hidden dialog as the root cause.

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