SUMMARY Changing the global display scale (X11) only works when using the slider or by using the spin box buttons. Setting the value directly by typing a value will reset the scale to "100%" when the spin box looses focus STEPS TO REPRODUCE 1. Set a new scale by typing e.g. "150 -> Enter" 2. The slider will move as expected, "Apply" button becomes active 3. Change focus, e.g. by clicking "Apply" OBSERVED RESULT The scale factor is reset to 100% EXPECTED RESULT The chosen scale factor should be applied SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.20.4 KDE Frameworks Version: 5.76.0 Qt Version: 5.15.2 Kernel Version: 5.9.12-arch1-1 OS Type: 64-bit Processors: 4 × Intel® Core™ i5-4460 CPU @ 3.20GHz Memory: 15.3 GiB of RAM Graphics Processor: Mesa DRI Intel® HD Graphics 4600
Side note: using the scroll wheel also seems to work fine
Works for me. I can delete the value in the spinbox, type a new one, hit the tab or enter key, and press the Apply button and have the new value applied. Are you using the KCM on Wayland or X11?
I'm using the KCM on X11 Using TAB works for me, too. It is reproducible here when using the steps as mentioned in my initial post. More exactly: 1. Select whole text in spinbox by clicking three times 2. type new value: 150 3. press ENTER 4. click "Apply" -> value changes back to 100% (and no info message at the top of the KCM appears as it should)
Changing status back to REPORTED
Created attachment 133958 [details] Screencast Add screencast to illustrate the issue
Can confirm with those exact steps to reproduce. Hitting the enter key seems to be the thing that makes it happen.
This has since been fixed.