I'm having a lot issues with my display after upgrading to 11.2, I have a LG 38GN950-B connected to M1 Mac mini (16/512) via type-c to HDMI. For some reason, my monitor refresh rate won't save, always reverting to 30hz after restarting. luckily switchResX can solve this issue.
Another issue I'm experiencing, which didn't happen in 11.1 is when the monitor goes to sleep after locking the Mac. When waking up the monitor in lock state, the image displayed in not full screen. changing the resolution seems to fix this....
Wish I didn't upgrade to 11.2 now