So far no (after a frozen viewport event).
So playing with this some more, a few other random tidbits. It seems to be just the screen saver settings, not related to Power & sleep screen setting. If I have screen saver set to (None) and “On resume, display logon screen” is true, I see the frozen viewport. If screen saver is set to Blank and “On resume, display logon screen” is false, I see it as well (screen saver None and display logon screen = false doesn’t do anything)
When frozen, if I change display modes, the viewport will redraw correctly, but as soon as I try to do anything (pan, draw a line), the viewport snaps back what it was frozen on when resuming from screen saver, and is unresponsive.
If I do the change display mode trick, and do something so the viewport goes back to the frozen state, when I quit Rhino, the viewport flips back to what it showed on the last display mode change draw. Upon hitting cancel, it snaps back to the frozen after screen saver.
Rhino has to be the active document when the screen saver kicks on. If it isn’t, the freezing isn’t as reliable.
Only other odd thing about my setup I can think of is I have stuff (Properties, Layers, Materials, etc.) on a second screen. Thinking it might be that, I tried TestHideOnDeactivate but no difference.