Holy cow, I wrote a book!
A bug report came in:
When I go to the Power Options control panel and select
Edit Plan Settings,
the Turn off display combo-box is disabled.
Is this a bug?
Shortly thereafter, this response was submitted:
Do you see a big yellow warning over the
Turn off display that says that some settings
are managed by your system administrator,
and a link called
Why can't I change some settings?
Yes, my machine is joined to a domain, and I see that yellow warning.
This is a fact of life.
People can't see what is right in front of their face.
Even though there's a warning right above the disabled item
explaining that it can't be changed due to an administrative setting,
even though there's a link on the page whose text directly
addresses the issue they are asking about,
even though they
confirm the existence of the explanatory text when asked,
they still don't read it or understand it.
It's another case of
You are so focused on the task of clicking on the combobox that
you completely disregard any other information because you simply
aren't expecting it to be there.