Windows 10: Project (Win + P) reverts to "PC screen only" when closing the lid

I have a Dell P2419H monitor connected (Mini Display Port to VGA adapter) to a MSI GP63-8RE laptop. The laptop display (display 1) is connected to Intel UHD graphics 630, the external monitor display (display 2) is connected to NVIDIA GeForce GTX 1060. As soon as I close the lid of the laptop, the external monitor switches from "display 2" to "display 1" and I'm getting this awful monitor lag (FPS dropping down). When I press Win + P and choose "Second screen only", it won't keep it and reverts to "PC screen only".
Strange is, that it works ok for a while, but something must interfere and I can't figure out what it is.
Maybe somebody else had this kind of problem and found a workaround or even a fix.
Thanks for any advises.

:)

 

LID close screen still on


Well, it was worth checking.

How long have you had this Asus ROG? Has it ever turned off the screen when the lid is closed?

The last post in this thread suggests it may be a hardware problem, the section starting 'Here's an interesting story about the GL502VS in general' describes a sequence of replacements from Asus, one of which behaved this way. Oddly, the OP actually wanted this behaviour.
https://rog.asus.com/forum/showthrea...-lid-is-closed

 

Disable laptop screen when lid is closed

Try Win+P -> "Second screen only"
Set 'what happens when lid is closed' to 'do nothing' in Control Panel->Power Options->choose what closing the lid does

 

Win 10 - computer won't lock or sleep when lid is closed

Hi Shari,

Thank you for posting on Microsoft Communities.

Please follow the methods mentioned below:

Method 1: Follow the steps:

• 
  Press Windows Key + X.
  
• 
  Select on Control Panel.
  
• 
  Click on Power Options. On the left, click on "Choose what closing the lid does". Click on the drop down menu for "When I close the lid" and choose "Sleep" or "Hibernate.
  

Method 2: I suggest you to run in-built Power troubleshooter and check. Follow the steps:

• Press Windows Key + X.
• Click on Control Panel.
• Select Troubleshooting on the left pane, click on
  View All.
• Click on Power to run the troubleshooter.

Method 3: If the above method doesn’t help, I would suggest you to
reset and restore all of the default Power Plans back with their default settings. Follow the steps.

• Press Windows Key + X.
• Select Command Prompt (Admin).
• At the command prompt, type powercfg -restoredefaultschemes, and then press
  ENTER.
• At the command prompt, type exit to exit the Command Prompt window.
• Restart the computer and check with the issue.

Let us know if the issue is resolved or if you require further assistance.