Click on the link below and follow the steps indicated.
https://www.howtogeek.com/122954/how-to-prevent-your-computer-from-waking-up-accidentally/
If that doesn't help, then we need more information about your computer. Operating system (Assuming Windows 10, which version?, make and model, etc. Since the Legacy Kernal Caller issue is generally driver related, have you tried updating the drivers mentioned in the "powercfg" info? Or since it's usually a network internet controller driver, have you checked to make sure it's the latest version from the NIC manufacturer or the computer manufacturer? NOT the one from Microsoft.
Hope this helps and let us know more.
Grif
Hey so recently I have been having an issue where my pc stopped going into sleep mode. I ran power cfg - requests and it turned up this. I have nothing open that is using audio ("Hey Cortana" is off I checked). I also have no idea what legacy kernal caller is or why its stopping my pc from going to sleep. I should note that if I disable and then re enable the headset through sounds, it goes back to normal and shows none in the powercfg. Anyone have any idea how to go about stopping these things from interfering with sleep mode?

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