What's the correct config for an 27inch display ( 1920 * 1080) to enable hidpi?

[MarouaneSH]

I just bought an external DELL 27inch monitor S2721HN, I use 1920 x 1080 as my resolution. After plugging it using an HDMI cable the quality looks poor, the text are blurry and the images are fuzzy. I read online that I need to enable HIDPI for that specific resolution I want. when using a resolution lower than 1024 640, the quality looks really good and HIDPI is enabled. but on other resolutions above 1024 640 the quality is poor, even if HIDPI is enabled. any one has any idea why this could happen ? thanks in advance.

OS : Big Sur 11.1 External Monitor model : DELL S2721HN ( 27inch)

[tronic1983]

Actually, 1080p monitor is very tricky. I have been using EW277HDR for years and I have succeed turning HiDPI on. So, I personally believe that you may face the same issue as mine. Now, the following is my solution.

1. Export EDID using DarwinDumper.
2. Use "Custom Resolution Utility" to import the EDID that you exported by DarwinDumper.
3. Add 4096 x 2048 resolutions using CRU, then, export it.
4. Use FixEDID to add scaled resolutions and export the EDID file again.
5. Combine EDID files that created by HiDPI script with the EDID that exported by FixEDID.
6. After that, put the combined EDID to the Library / Displays / Contents / Resources / Overrides.
7. Restart your mac.
8. Use RDM to choose the HiDPI resolutions.

I have tried my best to make it short, but it is really very tricky and difficult to make it work.

Please do not hesitate to tell me, if you need any help with this issue.

[tronic1983]

Hey, I have found a new way and I think it may be the easiest way for 1080P monitor to enable HiDPI. Please see attached.

[kaxians]

嘿，我找到了一种新方法，我认为这可能是 1080P 显示器启用 HiDPI 的最简单方法。请参照附件。

非常受用，感谢感谢