I've switched to a Mac full-time a few months ago. One weird thing keeps occuring--I'm unable to make menubar selections (which I first notice actually with a keyboard shortcut: Ctrl-Up Arrow or Ctrl-Down Arrow). It's unclear why this happens but typically happens after connecting my mac to an external monitor and then waking it up (although the problem is not instantaneous at that point--it occurs shortly thereafter).
I've tried the normal tips to get the menubar to respond such as killing all Dock processes and similar.
What does appear to work is simply lifting the lid of my Mac. It triggers a "hard" redraw on all of the graphics and restores the menubar functionality and voila! the Mission Control features mentioned above resume proper functionality. (I immediately close the lid which triggers a 2nd redraw but you get the gist.)
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