Quantcast
Channel: Monitor Tests Forum - All Forums
Viewing all articles
Browse latest Browse all 803

Native Resolution Only Available By Lowering Vertical Backporch

$
0
0
Hello all,

Hoping that someone could explain this to me.

2 Monitors. Resolution is 5120x2160 and 2560x2880. Both are being run through a dock connected by a single Thunderbolt (I am testing two Docks).

On Mac M2 - Both work just fine using a Display Port and Thunderbolt.

On PC (Intel Iris XE on Windows 11) Both work just fine if using Display Port for both Monitors. If using Display Port and Thunderbolt the native resolution will not be available on the 2560x2880 (when both are plugged in, if each is plugged in independently then no issue).

Oddly for the scenario on the PC that a Display Port and Thunderbolt Port is used if I change the Vertical Back Porch from 69 to 49 lines everything works.

What exactly is going on here? Is there a better way of doing this?

Edit:

If I leave the Vertical Back Porch to the Original but Change the Pixel Clock to be 480. Then it works as well. I noticed that when changing the Vertical Back Porch to 49 it put the pixel clock to 479.99. Perhaps a hardware limitation on the PC?

Viewing all articles
Browse latest Browse all 803

Trending Articles