(In reply to Alex Deucher from comment #4)
> Those messages would not be triggered by an application.  They can only be
> triggered by manually changing the power state via sysfs or via a display
> change event such as switching between single and multi display.

I think I have messed with the power state once by following the Arch Linux
wiki, though the wiki said the methods provided would not be permanent so it
isn't anything that I did right?

Are these errors responsible for the problems I am getting in OP?

Thanks again!