B550M Pro4 - Wake by USB£

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   Strangely the user manual of this board shows 

USB Keyboard/Mouse Power On
Allow the system to be waked up by an USB Keyboard/Mouse device.

Under ACPI config.
But there's no such option under the BIOS I have.

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user81 Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 27 Jan 2021 Location: India Status: Offline Points: 250	Post Options Post Reply Quote user81 Report Post Thanks(0) Quote Reply Topic: B550M Pro4 - Wake by USB£ Posted: 4 hours 20 minutes ago at 3:33pm
	Strangely the user manual of this board shows USB Keyboard/Mouse Power On Allow the system to be waked up by an USB Keyboard/Mouse device. Under ACPI config. But there's no such option under the BIOS I have.

user81 Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 27 Jan 2021 Location: India Status: Offline Points: 250	Post Options Post Reply Quote user81 Report Post Thanks(0) Quote Reply Posted: 19 Apr 2025 at 11:40pm
	Hi, I have Asrock B550M Pro4 motherboard with BIOS P2.30. AMD Ryzen 5 3500X CPU Everything is working fine. However I was just wondering if it's possible to Wake this system from USB? I have a USB to Rj45 adapter that can wake this system from Sleep(S2) but not from S3 shutdown. Of course I can always wake this from S3 by sending magic packet to onboard Ethernet. But if it's possible via USB, do let me know. I am not too sure exactly what setting come into effect in BIOS. Thanks and regards.