Linux Mint 22.2 Cinnamon 1. Mirror 2 displays 2. Click the "Join displays" button => Apply-button remains grayed out Solution Move the primary-display some pixels with the mouse => Apply-button becomes active <img width="1280" height="720" alt="Image" src="https://github.com/user-attachments/assets/e53cac65-87a8-4fb1-bcba-76bee63362df" /> <img width="1280" height="720" alt="Image" src="https://github.com/user-attachments/assets/b4b2e1cd-3f41-4db3-85cd-f2157ca19eab" />
Linux Mint 22.2 Cinnamon
Solution
Move the primary-display some pixels with the mouse => Apply-button becomes active