When I set the Global scaling to anything other than 100%, my drawing tablet's cursor is not where the actual clicking/hovering position is. For example, I'm using a Cintiq Pro 24, which is a 4K pen display. When I set the global scaling to 125%, the actual clicking/hovering position of my stylus offsets about 10-20cm lower than the cursor on screen. I began to notice this bug after the lastest KDE/Qt stack update. But I also only changed the global scaling for the firtst time at the same day, so I couldn't be too sure. The bug is affecting all KDE apps and Plasma system apps, including Dolphin, Konsole, Systemsettings and such. It doesn't affect Krita's the official appimage build. Operating System: Arch Linux KDE Plasma Version: 5.24.5 KDE Frameworks Version: 5.94.0 Qt Version: 5.15.4
Are you using the X11 session or the Wayland session?
X11
Created attachment 148939 [details] Screenshot of graphics tablet cursor offsets from actual clicking position in Dolphin 4K screen, 150% scaling. Notice how the cursor offsets from the dragging area. I tried on a Plasma Wayland session, it did not have this bug, but tablet support is still pretty broken.
Works fine here. As KWin doesn't do any input routing on X11 and the Krita build works fine, I assume it must be a Qt bug