https://bugzilla.suse.com/show_bug.cgi?id=1208714 https://bugzilla.suse.com/show_bug.cgi?id=1208714#c1 --- Comment #1 from Michael Hirmke <opensuse@mike.franken.de> --- I forgot to mention, that the variables are set in a pre-startup script for plasma (.config/plasma-workspace/env/scaling.sh). I tested and read a lot of things today, including the hidpi web pages for Qt5. export QT_FONT_DPI=192 solved the problem for most QT applications. I learnt that GDK_SCALE and GDK_DPI_SCALE variables are no longer used in plasma 5.27.1, instead xsettingsd should do that job, which is the "Gnome/GTK Settings Synchronization Service" in systemsettings5. Deactivating it solved the problem for GTK applications. I am quite sure, none of these "solutions" are reflecting the desired state of the system, but for the moment the system does what is necessary to use it. Therefore I reduced the severity to normal. -- You are receiving this mail because: You are on the CC list for the bug.