AMD Motherboards - B550M Pro4

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B550M Pro4 - Wake by USB£

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=106949
Printed Date: 21 Apr 2025 at 9:19pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: B550M Pro4 - Wake by USB£

Posted By: user81
Subject: B550M Pro4 - Wake by USB£
Date 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.

Replies:

Posted By: user81
Date Posted: 21 Apr 2025 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.