[lmc]

> my PC always comes back to the login screen immediately after I manually use "sleep" from the power menu. I have to to the sleep thing again. Has anyone else run into this issue?

Yes. By default moving the mouse or brushing the trackpad wakes the PC up... so when you have a fast machine it goes to sleep quicker than you can take your hand off the mouse. The solution is to turn off 'Allow device to wake' for the mouse in device manager. Well, that's been my experience anyway, there could be other causes I'm not aware of.

[Hendrikto]

This can be one cause, but sometimes the computer wakes up for no reason at all, even when not touching anything.

[throwa356262]

External mouse on the table moves when you bump into the table. And that wakes the computer.

Gets me every time. I have even started turning the mouse upside down to avoid this :(

[g947o]

No I always use keyboard for that.