Created attachment 130429 [details] Screenshot showing the problem SUMMARY When using UHD (HiDPI) screens, the login screen correctly scales the text and other UI elements, but does not change the layout and as a result the graphical elements overlap each other and the text is not readable. See screenshot. STEPS TO REPRODUCE 1. Connect a HiDPI screen (2160p or more) 2. Restart SDDM OBSERVED RESULT Graphical elements overlap each other including the text of user names and such. EXPECTED RESULT Graphical elements should be clearly identifiable and separate. SOFTWARE/OS VERSIONS Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.19.80 KDE Frameworks Version: 5.73.0 Qt Version: 5.14.2 ADDITIONAL INFORMATION Running Kubuntu with neon developer edition (unstable) repositories. I'm using 2 external UHD screens in addition to the laptop screen. Here's the xrandr output for SDDM: Screen 0: minimum 320 x 200, current 7680 x 2160, maximum 16384 x 16384 eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 346mm x 194mm 1920x1080 59.93*+ ... DP-1 disconnected (normal left inverted right x axis y axis) HDMI-1 disconnected (normal left inverted right x axis y axis) DP-2 disconnected (normal left inverted right x axis y axis) HDMI-2 disconnected (normal left inverted right x axis y axis) DP-1-1 disconnected (normal left inverted right x axis y axis) DP-1-2 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 609mm x 349mm 3840x2160 60.00*+ 29.98 2560x1440 59.95 2048x1280 59.99 1920x1200 59.88 2048x1080 24.00 1920x1080 60.00 60.00 50.00 59.94 24.00 23.98 ... DP-1-3 disconnected (normal left inverted right x axis y axis) DP-2-1 disconnected (normal left inverted right x axis y axis) DP-2-2 connected 3840x2160+3840+0 (normal left inverted right x axis y axis) 609mm x 349mm 3840x2160 60.00*+ 29.98 2560x1440 59.95 2048x1280 59.99 1920x1200 59.88 2048x1080 24.00 1920x1080 60.00 60.00 50.00 59.94 24.00 23.98 ... DP-2-3 disconnected (normal left inverted right x axis y axis) Also note that the laptop screen (eDP-1) shows a clipped area of on of the HiDPI screens instead of its own, which is another issue altogether.
1. How did you set the scale factor? In the KScreen KCM, or another method? 2. Did you sync your scale to SDDM? System Settings > Startup and Shutdown > Login screen (SDDM) > Advanced tab > Sync
When trying to answer the question I realized that this issue is likely an issue with a third-party SDDM theme that I had installed and not with the Breeze theme. I'll try to reproduce the problem with Breeze - but later as I don't have access to the UHD screens atm. So resolving for now and I'll re-open if I can reproduce this properly.