I have two-monitor desktop. One is U2415, connected via mini-dp -> DP and the other one is U2311H, connected via DVI on my Asus Strix Nvidia gtx950 video card.
When booting PC, DVI monitor is always first & faster even though it's my secondary display, but that's not an issue.
The real problem however is when waking my PC after deep sleep (30min, several hours or more) DP monitor won't wake up at all. It stays black. I have to manually press "power" button 2 times before monitor finally waking up and restoring 2-screen desktop.
Before Nvidia I had an AMD card and this was never an issue (though I used to connect U2415 via HDMI). I used the tool to remove all previous video drivers. I'm also using the latest Nvidia drivers, windows 10 x64.
I should note that when waking up from a short Sleep mode, everything is fine. If I wake monitors in less than 30mins or so, they work as should. I also enabled DP 1.2 to see if the problem will be resolved.
I'm up for suggestions what should I check next in Windows, monitor settings etc. ?
Thanks!