SUMMARY When creating a new account on a Wayland session, the created account will use a different screen scaling value than the "creating" account. This does not create a consistent user experience on a given system/configuration STEPS TO REPRODUCE 1. Acquire 27" 2560x1440 monitor 2. Set resolution to 2560x1440 3. Set screen scaling to 100% 4. Create new user account, then login OBSERVED RESULT New account will use 125% screen scaling EXPECTED RESULT New account should use 100% screen scaling for a consistent user experience. This reflects the behavior in other operating systems, such as Windows. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora 41/OpenSUSE Tumbleweed KDE Plasma Version: 6.2.5 KDE Frameworks Version: 6.10 Qt Version: 6.8.1 ADDITIONAL INFORMATION
It's intentional that KWin (not Plasma) does its best to use a sane scale factor for new accounts, which depends on the screen's resolution and physical size. Size of items on screen being a subjective preference, it's possible to override the default scale that KWin chooses, which is why this is user-customizable on a per-user basis. Given that a new user account may be used by a different person, it's reasonable to expect that person might have preferences that differ, which means it doesn't make sense to inherit the scale value set by a different user on the same machine.