[Moto7451]

I don’t think that’s actually correct either. The monitor is advertising Freesync/GSync variable refresh rate. The Ultragear monitors are high end gaming monitors so they come with 48-240Hz VRR on some monitors. That’s the 48-144hz extension in the EDID of this monitor.

Based on debugging some issues I was having in macOS, I discovered from various Reddit and forums that Linux doesn’t handle that well depending on your driver stack/how you connect. If you’re on very modern hardware, kernels, and the OEM drivers it’s a better situation. macOS also has partially broken support for Freesync (or ProMotion as Apple brands it) at the moment on Intel machines.

I have an Asus GSync monitor with 48-144hz compatibility. This works over DisplayPort on my M2 Pro MacBook. On my RX6800 equipped Intel Mac I get 100Hz over DisplayPort 1.4 and 120Hz over HDMI 2.0 due to a DSC bug affecting Intel Macs. Even without that bug, 120Hz sometimes presents the OP’s issues between startup and login so I use 100Hz. The betas for the next macOS apparently fix this.

Either way, it’s a fun patch