Ubuntu 20.04 – Wayland
Intel NUC 8i3BEH (Intel Iris 655)
Xiaomi 144 HZ Monitor + Dell Ultrasharp 60 HZ Monitor
Running Ubuntu on Wayland because of an known bug with monitors in portrait mode.
The issue, in Ubuntu settings I’ve set the primary display (Xiaomi 34″) to 120 HZ, connected through Displayport -> USB-C into Intel NUC. The secondary display Dell Ultrasharp is connected through HDMI and set to 60 HZ.
But when running various test (https://www.testufo.com) the primary display is capped at 60HZ.