Whenever I press “windows key+d” to hide all windows it seems to shut down the desktop viewer. I see the SteamVR notification with VorpDesktop stuck on waiting…
I don’t think there is a way to make that work currently. The desktop viewer uses a hidden window that probably gets also minimized when you minimize all windows. Regardless whether you do that via WIN+D or by clicking ‘Show desktop’.
It *might* be possible to handle this case in a future version by detecting when the window gets minimized. No promises, but I will check that.