Windows 10: DisplayPort second monitor disconnects when it sleeps

I have 2 monitors, an HDMI and a DisplayPort. It seems that, by design, the DisplayPort disconnects when it sleeps. This causes all of the open windows on that monitor move to the HDMI monitor because the DP monitor no longer exists. The only solution is to not put the monitors to sleep.


Is there any preferred setting for keeping a monitor on 24/7/365? Should I put up a black screen saver? If not what can I do to not burn out my monitors by having them on. I also don't want them bright all night long.


2 new HP PCs
2 Acer ET322QU monitors on each

1 HDMI - 1 DisplayPort

:)

 

Windows 10 does not recognise second monitor

Hi Raffaele,

For us to sort out this problem with your dual monitors, we'd like to gather more information about what happened so we can address the issue appropriately. Below are a few questions we'd like to ask:

• Does the monitor on the laptop work if you disconnect the other monitor?
• Is the second monitor connected to the laptop using a DVI, HDMI, or DisplayPort cable?

While waiting for your feedback, we suggest that you disconnect the second monitor from the laptop and check if its own monitor is working. If not, restart the laptop and check again.

Update us with the result.

Regards.

 

Fall creators update Displayport monitor won't go to sleep

Same issue after today's update to 1709 version: monitor won't go to sleep after configured time or after Win + L.

My configuration:

• Intel HD Graphics 3000 (driver version 9.17.10.4459)
• Monitor connected via DisplayPort
• Sleep disabled
• Screen are set to turn off after 10 minutes

Please help to fix this!

 

Windows 10 does not recognise second monitor

• Does the monitor on the laptop work if you disconnect the other monitor?
  • No. It only works if I disable the driver so that it reverts to the Basic Microsoft driver. But then it will not connect to the external monitor.
  • Driver details for Intel(R) HD Graphics 520
    • Driver version: 21.20.16.4505
    • Driver date: 19/08/2016
  • 
    I also tried to update this driver to no avail so I rolled it back.
    
• Is the second monitor connected to the laptop using a DVI, HDMI, or DisplayPort cable?
  • It is connected via an HDMI cable.
• 
  Is it possible that the update/roll back process left remnants of the program in the Registry etc and these are interacting in a way to stop the proper functioning the graphics? Just a thought. When I did the update it asked me if I wanted it installed in
  the existing drivers folder? I said yes. Was this the right thing to do?
  
• When I disconnected the screen as you asked the laptop display remained blank. Restarting had no effect. As I said above, at the moment the only way I can activate the laptop display is disable the Intel driver and revert to the Microsoft Basic Driver but
  then I can't connect to the external screen.