Dual monitors won't "wake up" after sleep

My laptop is set to go to sleep when not in use, but when I have it set to use Dual screens, after I "wake it up", all I can see is the mouse on the second screen, flickering. If I unplug the VGA cable, the laptop screen wakes up, and I can see the log-in screen. Once I plug the VGA cable back in, the second screen "wakes up" too.

This problem does not occur on startup, and I have set the second screen to be my main display - but I do often disconnect the laptop to take it with me. I have also changed the settings to make the laptop screen my main display, and the issue still occurs, just on the laptop screen instead.

This has only just started happening, around the time of the last update (2017-06 Cumulative Update for Windows 10 Version 1607 for x64-based Systems (KB4022715)).

Running Windows 10 Home, Acer Aspire E 15. Let mem know if additional information is required.

Solution 1:

I had a similar issue with one of my dual monitors not showing up after resuming from sleep. I used the keyboard shortcut Ctrl+Shift+Win+B to restart the graphics driver and my main screen flickered off and then both screens turned on.

There's some more information in this question.

Solution 2:

I found a simple solution I make sure that no monitor is using VGA. It seems that Windows 10 will "wake up" the Digital Monitor (HDMI/DVI/DP) but not VGA. I have had to remove the VGA connection on countless users computers to get around the problem.

I have tried to use the DP to VGA, HDMI to VGA and DVI to VGA converters but that does not seem to solve the problem. The monitor works correctly with DVI to HDMI, mini DP to DVI and DP to DVI.