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I'm using Windows 10 connected to a computer monitor with DisplayPort and a Samsung TV with HDMI. I have the monitor as the second screen (id=2) and the TV as the first one (id=1).

Most of the time I only want to use the monitor and I do that by switching the TV off and doing Windows+P so it's set to "Second Screen Only".

The problem is that the TV is detected most of the time, but sometimes the detection gets lost for a second and all my windows are rearranged (even though my monitor is the only thing on). So it's basically a useless rearrangement. This all looks like my screen goes off for a second and goes back on every 2/3 minutes while the TV is off.

I have tried deactivating the TV, checking sleep options, try to reorder display output ids (but was not able to)... Is there any solution for this?

What it looks like: https://www.youtube.com/shorts/Hq-GeVZ39c8

jmriego
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1 Answers1

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DisplayPort acts as a PNP device, so turning off the monitor, even for an instant, is treated as if it was removed and windows are moved out and rearranged because Windows forgets this device, until it is turned on again and is "discovered".

A solution which will prevent Windows from verifying the continued presence of a DisplayPort monitor and so to not detect that it's off, is to keep the Extended Display Identification Data (EDID) properties of the monitor.

For this solution see these answers of mine (you are not the only one to have had this problem):

harrymc
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