Question Primary Monitor flickers

[Plexian]

Hey community,

I apologize in advance if this is not the right spot to post this question, please move it or tell me where to ask it instead.

Tldr: My primary monitor flickers every once in a while (about every 30secs) as you can see in the link (slowed by 1/10).:

https://imgur.com/a/rG3W7oi

View: https://imgur.com/a/rG3W7oi


My setup contains two monitors, the problematic one being an AOC G2790PX connected via DP, the other one is a 2560x1080 LG monitor connected with HDMI. My workstation is running Win10 Pro and uses a GTX 1060 6GB.

Following things probably help finding the source:

• The primary monitor (the flickering one) is new. Long story short, I bought it, used it for 2 months, had a problem, sent it back, received a new model and since then I do have this flickering. (although this indicates the monitor is faulty, I don't believe that, see next points)
• The flickering only occurs if both monitors are connected - disconnecting the second one solves the problem immediately.
• When booting from a Ubuntu USB, I can't reproduce the problem. (!)
• Using a different DP cable didn't help.
• Reinstalling all drivers didn't help.

I appreciate any ideas you can come up with, I'd prefer not to reinstall my entire system if there is a simpler way.

Thanks in advance,
Plexian

 

[Plexian]

I'd appreciate any kind of help, even somebody who tells me that the most likely cause for this problem is software related, meaning that reinstalling windows might help.

 

[faalin]

When i looked up the AOC G2790PX it said it was 1920x1080 and your LG is 2560x1080, do you know what Hz both of these are running at?

Ive read and heard a lot about issues with screens not being the same rez or Hz will cause issues.

 

[Plexian]

The AOC ran at 144Hz, the LG at 60Hz.
You got a very nice point though, thanks for that!: Changing the frame rate of the AOC to 60Hz as well, fixes the problem!
This is only a temporary soultion, since I obviously wanna make use of the 144Hz, that's why I bought it.
Any ideas on how to approach this problem?

 

[AllanGH]

Replace the LG with an AOC G2790PX...