People with Navi chipsets (5XXX series)

[Tiem]

I'm trying to get more data on this and understand what's going on and more importantly if we can come together and fix it.

Does anyone with a 5700 or any other Navi flavour, Clover or OpenCore, have the correct display resolution in System Report > Graphics/Displays.

Moreover, create a full screen screenshot (CMD + SHIFT + 3) and verify that it's drawing the desktop at whatever rate it's reporting.

 

[joevt]

System Information.app only reports the framebuffer size (5120x2880), draw scale ("UI looks like 2560x1440" means text and objects are drawn twice as wide and twice as tall), and framebuffer pixel format. It does not show the output resolution (probably 3840x2160 in your case) or output pixel format (for example, some HDMI outputs may use YCbCr 4:2:0 instead of RGB 4:4:4).

The GPU can scale the framebuffer to the output signal. The display can scale the input signal to its pixels. Scaling in either case can work whether the original is smaller or larger than the result.

SwitchResX will show the output resolution when you double click the current resolution in the Current Resolutions tab for the display in SwitchResX. But even then, the information is not true in the case of a display like the LG UltraFine 5K or the iMac 5K Retina display where the output signal is actually two DisplayPort signals (one for the left side and one for the right side of the display). In that case, the Apple drivers tell SwitchResX to show a specific timing that represents the total (but there is no way to derive the timing info for the separate signals from the total timing info).

To get all the info, use the AGDCDiagnose command. Unlike SwitchResX, it will show all information for all the signals and the output pixel format.