Third screen in triple monitor setup goes black randomly

freaknbigpanda

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Feb 15, 2021
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I have two dell u2715h monitors connected via DisplayPort and one dell u2715h connected via hdmi all running at 2540x1440 60hz. Randomly one of the monitors connected via DisplayPort goes black. Sometimes it comes back in a few seconds but other times it stays black. Sometimes I get lucky and I will get a constant signal for maybe 30 minutes before it goes black again. I’ve tried switching cables around but always one of the two monitors connected via DisplayPort has issues staying turned on. The monitor connected via hdmi has no issues, it seems this is a problem with the DisplayPort ports specifically.

I’m using a 6800 xt gaming trio graphics card, Msi b550m mortar wifi motherboard 5950x ryzen cpu.

latest amd adrenaline drivers and windows 10

Any ideas what could be causing this?
 

plutomate

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Jul 30, 2015
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when one of the DP monitor disconnect, can windows still see it as a monitor?
 

Svet

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Randomly one of the monitors connected via DisplayPort goes black.
Which one of them? [plutomate already asked you this, but no answer]
Have you tried to reverse the monitor places? etc rotate their positions => primary => secondary, secondary => primary
then check if same monitor will go back, or the one on the specified position.

Also try use single monitor, with either of them alone,
and see if there will be any issues when using single display only at the time.

P.S: Does both monitor are using the same firmware and are they the latest one?
 
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