All I did was on first install go to display settings and change to 144hz in the OS and screen then goes black and never came back. Force a shutdown and boots back to a black screen after login.
I was eventually able to change things back to 60hz and working through booting to cli but 144 never wanted to work (am admittedly using Nvidia card).
So not completely borked but not ideal at all.
Honestly don't remember which I was running. Was a new install of testing Endevour OS with an Nvidia card. Changed the refresh rate through the display settings to 144 and it went black and never came back. Fixed it back to 60 through cli boot eventually but it never liked changing it off that.