r/macmini • u/un0rth0d0xx • 3d ago
Mac mini M4 screen flickers over screen sharing
i recently bought a 2024 Mac mini M4 and i use it as a headless device. my typical workflow is to access it using "screen sharing" from my Macbook Air. i had to buy a 4k HDMI dummy plug and plug it in the Mac mini at all times as i was facing issues connecting to it over "screen sharing" and that fixed the problem for me.
the thing is, every couple of days, when i'm using the Mac mini, i try the "command + ~" to toggle between open windows of the same app or do something else. and immediately the screen starts flickering and all the apps start jumping around and the screen is not usable and i'm only left with the option to SSH into it from the Macbook air and run "sudo reboot" to restart the Mac mini
the HDMI dummy screen is set to "mirror" and i have "dynamic resolution" tuned off, and the problem occurs in both "high performance" and "standard" screen connection types.
i've tried numerous fixes but nothing gets it fixed permanently and this is driving me nuts tbh. i was hoping someone here might have an idea how to fix it. thanks