4k UHD Problem

[hitINdaGs]

Hey there,
I have a problem wit my 4k display in combination with the Sapphire RT 5700xt. My mouse cursor freezes every 3 seconds. On DP it's not so bad but on HDMI it renders the system unusable. When I switch the monitor to DP1.1 instead of 1.2, the freeze is gone but I seem to get a general lag and only 30Hz instead of 60Hz (could be the reason for what feels like a general lag). When using my old 2K display, I don't have any problem at all.

I'm using the latest WEG and Lilu with agdpmod=pikera.
I am also wondering if the problem is monitor specific or if it would be the same with other 4k displays.
Unfortunately, I don't have another 4k display to test.

System specs
Monitor: PL2792UH (IIYAMA XUB2792UHSU)
Auflösung: 3840 x 2160 (2160p/4K UHD 1 - Ultra High Definition)
UI sieht aus wie: 1920 x 1080 @ 60 Hz

Does anybody know what to do?

 

[slim.jim]

You can get access to the refresh rate in System Preferences to change it to 60hz. When in display settings hold Option and click the Scaled radio button, then check Show Low Resolutions Modes.

 

[driftwood86]

I seem to have a similar problem on 5700XT ... stuck at 30Hz no matter what I try. Als.o, holding down option reveals the different resolutions but no refresh rate (Catalina 10.15.3)

 

[slim.jim]

I seem to have a similar problem on 5700XT ... stuck at 30Hz no matter what I try. Als.o, holding down option reveals the different resolutions but no refresh rate (Catalina 10.15.3)
View attachment 465427

View attachment 465428

You have to check the "Show low resolution modes" to show the Refresh Rate dropdown menu.