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NVikings

2 Monitors, but main does not wake after blank

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Posted · Original PosterOP

I've recently started using 2 monitors.

  • My main monitor connected by DP (Monitor 1, 1920x1080 at 144hz)
  • My 2nd monitor connected by DVI (Monitor 2, 1680x1050 at 60hz)


My PC is set to never sleep, but to turn off screens after 30minutes.

When I try to wake my screens again, around half of the time only my 2nd monitor recieves a video signal.

I then have to disconnect and connect the DP of my main monitor in order to recieve a signal.

 

Things I've tried:

  • This issue is not exclusive to the one DP port on my GPU as I've tried both ports.
  • I have tried disabling DDC/CI on the main monitor.
  • Updating drivers for the main monitor.

Observations:

  • Not sure if it is of any use, but during boot my 2nd monitor shows bootscreen, while it switches to my main monitor on login.
  • In NVIDIA control panel, if I set my main monitor resolution to 1920x1080 (native) under Ultra HD, HD, SD. I cannot pick a framerate above 60hz. I have to set 1920x1080 under PC.


Any ideas how to resolve this issue? It is getting really annoying having to unplug my DP cable multiple times a day...
Thank you in advance!

 

Specs:

  • Motherboard: MSI Z270 Gaming Pro Carbon
    CPU: Intel Core i7-7700K Kaby Lake | 4.5 GHz
    GPU: MSI GeForce GTX 1080 Ti Gaming X | 1911 MHz
    RAM: Corsair Vengeance LED DDR4 16GB | 3200 MHz
    Storage: Samsung 960 EVO 500GB M.2 PCIe SSD
    PSU: Corsair RM750i
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What happens if you turn the power of the monitor off and back on without unplugging the DP?

 

Could be a power saving on the monitor, enough time asleep it powers off, I have a TV that does that.

Could be an iffy wire in the DP cable, you might try another. 

 

Do you have the model numbers of the monitor?

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Posted · Original PosterOP
On 6/1/2020 at 10:31 AM, HalGameGuru said:

What happens if you turn the power of the monitor off and back on without unplugging the DP?

 

Could be a power saving on the monitor, enough time asleep it powers off, I have a TV that does that.

Could be an iffy wire in the DP cable, you might try another. 

 

Do you have the model numbers of the monitor?

Turning the monitor on and off does not resolve the issue. It also happens when the monitor is off and I try to turn it on and then wake the screen.
I very rarely I get DP Out of Range if waking the screen right after it goes blank. Turning the monitor off and on again, resolves that issue.
The monitor in question is a BenQ XL2720z

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I'd wanna test with a new cable. If you wake the computer and THEN turn on the screen does it do the same? Do you have a DP to DVI adapter you could use to see if the other monitor has the same issue from the DP ports?

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Posted · Original PosterOP
7 hours ago, HalGameGuru said:

I'd wanna test with a new cable. If you wake the computer and THEN turn on the screen does it do the same? Do you have a DP to DVI adapter you could use to see if the other monitor has the same issue from the DP ports?

Yes the same issue if I wake then turn on monitor. What really boggles my mind is how this is not a consistant issue, but happens around 50% of the time.
The cable had the issues since I first bought it and it is DP 1.4 compatible.
Guess I will have to try a new cable sometime. I do not have DP to DVI adapter.

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