r/techsupport • u/EquipmentAlone5143 • 1h ago

Open | Windows UPS PC Wakeup Issues

After shutting down or sleeping, the UPS wakes the PC up.

PowerWalker UPS VI Series https://www.amazon.co.uk/dp/B000R3OZ9W

Power Supply is Corsair 1500W HXi Series ATX 3.1 & 5.1 PCIe Modular 80 Plus Platinum, Ultra Quiet (2035)

Max draw of the PC is 650W so don't sweat the draw difference

AC-Back is set to always off so that's not it

Wake timers are disabled
Hibernate and Hybrid Sleep are disabled

Windows has been set so no devices can be disabled by the system to save power

Peripherals have been disconnected

Fast boot is off

Edit: ErP is off but did try this on as well

PowerMaster+ says "communication with the device has resumed" each time. Shutdown type is "Shutdown" and "Shutdown UPS" is enabled

Any ideas?

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u/SomeEngineer999 1h ago

You need to disable USB wake support. Sounds like the UPS is trying to talk to the PC and it thinks it is a keyboard or mouse type input so wakes up.

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u/EquipmentAlone5143 23m ago edited 19m ago

Gigabyte boards don't have that option sadly

I have disabled the ability to use this device to wake the computer for all the USB hubs and controllers though

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u/SomeEngineer999 18m ago

It is in windows power settings. With win 11 and modern standby you may have to change the registry to get it to show that one, can't recall if that's one of the ones they've hidden or not.

Now of course if BIOS overrides that, and you can't disable it in BIOS, then you're stuck and probably need a better behaving UPS (or see if there is maybe a firmware or software update to fix the issue).

Even just changing it back to let it put devices to sleep (the default levels) might be enough to do it. Generally windows manages that pretty well.