MBP M1 Max - external display with blurry fonts (Dell U2415)

[Thyreus]

Hi guys,

I am using a Dell U2415 monitor connected to my MBP M1 (2021) with a DiplayPort to USB-C cable.
Unfortunately the fonts a blurry on the Dell monitor.

I followed this thread:

M1 Mac External Display - Fuzzy Fonts & Colors - YPBPR vs RGB

Dell Ultrasharp U2720Q are discounted today. 693 CAD + tax. Insane. I’m very tempted to pick up two.

forums.macrumors.com

and tried the steps described by @jkirchgessner07 here:

M1 Mac External Display - Fuzzy Fonts & Colors - YPBPR vs RGB

Long time PC user, who just switched over to a M1 Macbook Pro. I encountered this same exact issue on my Dell U2515H monitor (2560x1440). As a designer, it was driving me nuts having to deal with fuzzy fonts, when the PC equivalent on the same monitor was tack sharp. From my googling and...

forums.macrumors.com

but it did not work for me:
- I set DP on the Dell to 1.2
- I tried the commands to change the fonts:
a.) defaults -currentHost write -g AppleFontSmoothing -int 0
b.) defaults write -g CGFontRenderingFontSmoothingDisabled -bool YES
- the Dell is using already RGB color profile.

Any help?

It worked for @amitdel here:

M1 Mac External Display - Fuzzy Fonts & Colors - YPBPR vs RGB

@jkirchgessner07 - I can confirm that your fix is working for me!!!!! Even with my old Dell U2415 (1080p monitor), I am seeing a) Extremely pleasing fonts b) Great Black on white characters in programs like Excel c) Nice sharpness on web browsers The font-sharpness looks reasonably close to...

forums.macrumors.com

but not in my case. Perhaps because my MBP is on Monterey 12.0.1?

Thanks for your thoughts.

 

[ingambe]

I faced the same issue with another display, turns out the refresh rate was too high (it was set by default to this value)
After turning it down from 75Hz to 60Hz the problem was solved

 

[Thyreus]

Thanks @ingambe. How can I change the frequency? In the settings I´m only able to change the resolution, the color profile and to choose to turn the extern display. I clicked on scaled while holding the option key but there was no value for the refresh rate. Thank you!

 

[ingambe]

I had this option on my screen settings under the definition setting

 

[Thyreus]

Thank you @ingame. My monitor does not have it and I found out that it is running with 60 Hz already and the blurring is still there.