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#1
Won't sleep issue - Solved!
For those of us that use a RealTek sound chipset on a motherboard, there is an issue when using the Line In port. If you enable this feature, this will prevent your PC from going to sleep.
Here is a screenshot of the port enabled, showing the stream is prevent sleep:
I disable the port, reboot, and now there is no audio stream blocking the PC from sleeping:
Hope this helps. I'm considering disabling the Realtek on my motherboard and go with a sound card.