SER9 Pro 370 two faulty USB devices prevent fully entering S0 sleep DRIPS state

zzp

This is a fresh install of Windows 11 on a SER9 Pro 370, with every driver installed from Beelink’s site.
While everything works fine, the power consumption looks weird. I took a measure from a Kill-a-watt:
Idle: 15w
Sleep (S0): 6-8w
As an excellent mobile processor, 370 HX SoC’s typical S0 sleep power is 0.6_1w.
I absolutely have no USB devices attached either (only 1x power cable, 1x Ethernet cable & 1x HDMI cable). There must be something wrong.
Digging deeper,
With powercfg /energy command, I was able to find two faulty USB devices (AMD USB 3.1 XHCI controller on PCI 199 function 0 & 4).
Citing from Microsoft:

USB devices must support selective suspend on Modern Standby devices to ensure that the SoC can enter DRIPS while the screen is off

This is the culprit.
Unfortunately I didn’t find any solution yet. Beelink should solve this bug ASAP.

Screenshots:

USB selective suspend error
The faulty device with consistent D0 power state

support4

zzp
Hi there
Our USB ports will remain on ,even if you shut it off , due to WOL function needs it.

But you can try this way to save power .
Please check the save energy in the device manager—universal serial bus controller–USB hub—properties–power management—check “Allow the computer to turn off the device to save power”

zzp

I have found the issue, it’s not because of WOL.
It’s the builtin Audio device (speaker & microphone). It’s connected to one of the USB3.1 hub; and it’s drawing full power even in sleep mode, which prevents the system from entering the Deep Sleep state.
Disabling them doesn’t help. Uninstalling them also doesn’t help.
I guess this is a hardware flaw, an oversight in design,
What an irony that Beelink creates a device that only supports S0 sleep, yet refuses it to enter a real Modern Standby.
I dunno if you can solve this via BIOS update, if so, I hope to hear your solution.
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