My desktop has a MSI MAG B650 GAMING PLUS WIFI motherboard. I can't wake it from sleep with the mouse or the keyboard
ChatGPT said:
The MSI MAG B650 GAMING PLUS WIFI motherboard can support waking from sleep via USB (mouse or keyboard), but this typically requires enabling the right settings in both the BIOS and Windows. Here's a direct checklist to get this working:
1. BIOS Settings
Enter BIOS (press Del during boot) and check the following:
Advanced > Wake Up Event Setup:
Wake from USB Device → Enabled
Resume By USB Device (S3) → Enabled
Some BIOS versions may phrase this differently, but look for options like ErP, S3 Resume, Wake from USB, etc.
Check ErP Setting:
Under Settings > Advanced > Power Management Setup:
ErP Ready → Disabled
If enabled, it can disable power to USB ports during sleep, preventing wake.
2. Windows Settings
Even with BIOS properly set, Windows must allow USB devices to wake the PC:
Device Manager:
Expand Keyboards and Mice and other pointing devices
For each device:
Right-click > Properties
Go to Power Management tab
Tick "Allow this device to wake the computer"
Power Plan Settings:
Go to Control Panel > Power Options > Change plan settings > Change advanced power settings
Under USB settings > USB selective suspend setting, set to Disabled
3. Confirm Sleep State
Make sure your PC is actually entering Sleep (S3) and not Hybrid Sleep or Hibernation (S4/S5), which often disable USB wake.
Run this in Command Prompt:
css
Copy
Edit
powercfg -a
Ensure S3 Sleep is listed as available.
If only Modern Standby (S0 Low Power Idle) is listed, USB wake support is less predictable.
4. Check USB Port Power
Some motherboards only keep rear USB ports powered during sleep, or specific ports.
Try using USB 2.0 ports instead of USB 3.x.
Try both rear and front panel ports.
If you've checked all these and it still doesn't work, let me know:
What version of Windows you're using
Whether the mouse/keyboard are wired or wireless
If any LEDs on the devices stay on during sleep (indicating power remains)
That will help pinpoint the issue further.
You said:
in the BIOS settings, what options are available under 'wake up event by'?
ChatGPT said:
On the MSI MAG B650 GAMING PLUS WIFI motherboard (and most modern MSI AM5 boards), the BIOS section for wake-up events is under:
BIOS > Settings > Advanced > Wake Up Event Setup
Here are the typical options you’ll see under Wake Up Event By (or similar wording depending on BIOS version):
Wake Up Event Setup – Options:
Setting Description
Wake Up Event By Master switch: Enable/Disable wake events
Resume by RTC Alarm Wake the system at a scheduled time (set below)
Resume by USB Device Wake from sleep via USB keyboard/mouse
Resume by PS/2 Keyboard Wake using PS/2 keyboard (not relevant on most modern builds)
Resume by PCI-E Device Wake via PCI-E devices (e.g. network card – for Wake-on-LAN)
Resume by Onboard LAN Wake via onboard Ethernet (WOL)
Resume by PME# Device Wake from sleep via PCI/PCI-E Power Management Events
Resume from S3 by USB Device Specific setting allowing USB device to wake from S3 sleep
You may not see all of these if ErP is enabled.
Important: Disable ErP
Go to:
Settings > Advanced > Power Management Setup > ErP Ready
Set it to: Disabled
If ErP is enabled, the motherboard cuts power to USB devices during sleep, making wake-by-USB impossible.
Once these settings are configured:
Save and exit BIOS.
In Windows Device Manager, make sure the USB keyboard/mouse can wake the system (Power Management tab).
Test waking from S3 sleep (not hibernate or shutdown).
Let me know if any of the above options are missing or greyed out in your BIOS version.
You said:
the current selection is [OS]
ChatGPT said:
If the “Wake Up Event By” setting in your BIOS is currently set to [OS], that means the firmware is deferring control of wake events (USB, LAN, etc.) to the operating system — in your case, Windows. This can limit options like waking from USB during S3 sleep if Windows isn’t correctly set up or if power is cut to USB ports during sleep.
What to do:
Change "Wake Up Event By" from [OS] to [BIOS]
This gives the BIOS control over wake sources like USB devices, allowing them to trigger wake events regardless of what Windows is doing.
After changing it, more options like Resume by USB Device, Resume by PCI-E, etc., should become available and configurable.
Then, make sure:
ErP Ready is set to Disabled under:
Settings > Advanced > Power Management Setup
Resume by USB Device is Enabled
Optionally enable Resume by PCI-E Device if you want wake-on-LAN
Save and Exit BIOS (F10)
In Windows:
Open Device Manager
Right-click on your mouse and keyboard devices under Mice and Keyboards
Go to Power Management tab
Check “Allow this device to wake the computer”
Once you’ve made these changes, test by putting your PC to sleep (via Start > Power > Sleep) and trying to wake it with the mouse or keyboard.
Let me know if you don’t see the additional options after switching to [BIOS].
