> Unfortunately, it seems a subset of monitors have a strangely broken behavior where, when waking up from standby, they will virtually disconnect their inputs

> Unfortunately, it seems a subset of monitors have a strangely broken behavior where, when waking up from standby, they will virtually disconnect their inputs a few seconds later, then connect them again. I'd be curious to know whether disabling "EUP Compliance"/"EUP Deep Sleep" mode resolves this issue. The long and short of it is that the EU passed some idle power requirements that monitor companies found difficult (or expensive?) to implement and it's caused basically a decade of weird bugs in PCs, docks, and other hardware. To hit the power target they put the monitor into a really really deep sleep state and some of the implementations don't always wake up properly, or do weird things as they wake back up and restart. (this occurs even on some premium monitors and brands... my Dell P2715Q is a very high-end monitor for its day and it has bad issues with freezing after wakeup!) This is the source of the classic "my monitor sometimes won't wake up after my PC goes to sleep, until I cycle the power to the monitor" and "all my desktop icons reshuffle themselves after sleep" and I suspect also the root cause of many "displayport issues" with thunderbolt docks. I think EUP power draw is also why many monitors "disconnect themselves" when idle... from the perspective of the PC it's in a deep enough state it's not even responding. This is legal behavior according to the spec, it's not incorrect to do so, but it's not required, and it confuses the PC which obviously now thinks the monitor is disconnected. I don't have any fine-grain knowledge of exactly what they are doing when they wake up but... rebooting the monitor as a method to wake it up from a deep-sleep state wouldn't surprise me all that much. It would explain the "desktop icons shuffling themselves" failure mode, windows sees a disconnected monitor (even for a second) and goes to the fallback virtual monitor (640x480 res), that's the classic behavior for a disconnected monitor, and rebooting explains why it would disconnect. Apologies to the planet, I wish it wasn't implemented so poorly, but, turning off EUP Deep Sleep is pretty much the first thing you should do when you buy a monitor.