The HD4400 does not work properly at 2K resolution

[inan999]

Hey team EliteMacx86,
I installed Mac OS Big Sur in my laptop (Thinkpad x1c gen2), but,i have some questions for hd4400.
My monitor resolution is 2560x1440, but It can't work at this resolution, the monitor will blink， only works 2048x1152.
I try to change AAPL,ig-platform-id "0000160A",it works in 2k not blink, but QE/CI is not normal, only use "0600260A" QE/CI works normal
i Don't know why?
Here`s my config,
Thanks in advance!!!!

 

[EliteMacx86]

Hey team EliteMacx86,
I installed Mac OS Big Sur in my laptop (Thinkpad x1c gen2), but,i have some questions for hd4400.
My monitor resolution is 2560x1440, but It can't work at this resolution, the monitor will blink， only works 2048x1152.
I try to change AAPL,ig-platform-id "0000160A",it works in 2k not blink, but QE/CI is not normal, only use "0600260A" QE/CI works normal
i Don't know why?
Here`s my config,
Thanks in advance!!!!

4K/UHD/QHD/QHD+ Displays have additional requirements.

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