Environment Component Model / Version CPU AMD Ryzen 5 5600G Motherboard ASUS TUF GAMING X570-PLUS Graphics Card ASUS DUAL-RX9060XT-16G OS Windows 11 [Conclusion] Summary of the Cause and Solution For those who want a quick fix, here is the summary of the cause and the solution. The sleep wake-up failure that had been occurring for years was actually a combination of two independent issues: the "driver" and the "BIOS". Timing of Occurrence Cause Solution When Windows 11 was first installed Driver-related (Remnants of amdkmdag.sys ) Clean install after completely removing it with AMD Cleanup Utility After adding the new GPU BIOS-related (Motherboard firmware bug) Update BIOS to the latest version using ASUS EZ Flash 3 A clean installation of the driver only provided a "temporary relief." The root cause lay in the motherboard's BIOS.…