HP ProBook 650 G2 flickering with intel HD520 when external DP monitor is connected and outputs 4K@60Hz

[Stefan Milev]

Hi,

 

I hope someone can help me with this annoying issue. I have an HP ProBook 650 G2 laptop and recently decided to hackintosh it. I use opencore 0.9.6 to boot. I have an installation of Mojave, Ventura and Sonoma on it for testing. All 3 OSes are running, power management is running, sleep works, wifi and Bluetooth work natively (changed the card with BCM94360NG). Up until yesterday I did not even know that I have this issue. If I connect an external 4K monitor to the DisplayPort of the laptop, I cannot get 60Hz to work in any resolution, I was using AAPL,ig-platform-id  0000C087 and device-id  16590000 . I use the same monitor with the same laptop on Windows 10 and I observe no issues with hardware or performance.

I started looking around and I found a guide that was suggesting to use 00001B59 for the framebuffer. I tested that and it gave me the option to enable 4K at 60Hz. Unfortunately, when I use some graphic demanding tasks, the external monitor flickers, sometimes the laptop/LVDC monitor flickers as well. When I say graphic intensive, that means light stuff like moving windows around quickly.

I'm not exactly sure why is this happening. I hope that someone has a setup like this functioning and can shed some light on the issue. I will attach my EFI folder and some screenshots for information.

 

 

 

 

 

 

 

 

 

Thanks in advance to anyone who looks at this.

 

 

 

 

 

 

EFI.zip

Attaching IOreg, could not do it in the previous post.

MacBookPro14.1_IOreg.zip

[Stefan Milev]

Nobody has this IGPU?