Comment # 18 on bug 1089932 from Terje J. Hanssen

Here is the output - not sure the ServerArguments line should be included, but
I tried both with and without it. 
Te y2controlcenter and the sddm-greeter opened in 'full screen', with normal
font size as before. 
I did not notice any change either after 'rcxdm restart' (logout).


# ServerArguments=-nolisten tcp -dpi 192
If 'tcp' is not a typo you can use command-not-found to lookup the package that
contains it, like this:
    cnf tcp
linux-hxpp:~ # unset QT_AUTO_SCREEN_SCALE_FACTOR QT_SCREEN_SCALE_FACTORS
linux-hxpp:~ # QT_AUTO_SCREEN_SCALE_FACTOR=1 /usr/lib/YaST2/bin/y2controlcenter
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
linux-hxpp:~ # 
linux-hxpp:~ # QT_AUTO_SCREEN_SCALE_FACTOR=1 sddm-greeter --test-mode --theme
/usr/share/sddm/themes/breeze-openSUSE