2018 MacBook Pro 15" w/ Radeon Pro 560X has bad colors and fonts on Dell U2715H via DisplayPort

[incurma]

Connected my 2018 MacBook Pro 15" with Radeon Pro 560X to a Dell U2715H via DisplayPort. The colors and font rendering are terrible. Letters seem to change colors as I re-position application windows by a single pixel.

I tried the following:

1. Enabled/disabled LCD font rendering. No difference.
2. Applied different color profiles. No difference.

I am using this USB-C to DisplayPort cable: https://www.amazon.com/dp/B01J6DT07...subtag=AgEAAAAAAAAAAR80AAAAAGwTUYoAAAAAW2kNHQ

I tried connecting the MacBook to the monitor using a USB-C adapter <> HDMI Cable <> Monitor. Believe it or not the fonts look just fine when using this connection.

My 2017 MacBook Pro 15" connected to the same monitor via DisplayPort (and using the same cable) looks wonderful.

Is anyone running the 2018 MacBook Pro with the same Dell monitor? Is it working as expected?

Can anyone provide help or recommendations for troubleshooting the DisplayPort connection?

 

[maximit]

Check this thread:

https://forums.macrumors.com/threads/2018-macbook-pro-blurry-displayport-output.2130629/

 

[joshi3joshi]

I had the exact same problem as you, (same computer, same Dell display, even got the same cable as you) but as the user above me mentioned, I was able to fix it by following this fix:

http://www.mathewinkson.com/2013/03...ix-the-picture-quality-of-an-external-monitor

 

[timeslip]

As mentioned in the other thread...

I don't understand how this is a problem on the 2018 Macbook Pro, but my 2017 13" MBP and my wife's Macbook using TB -> Displayport works just fine.