When I launch the game, it uses only a part of the fullscreen. When I open the
settings, the resolution is listed as 320x175 (the lowest one), even though the
real one is obviously higher. Magnification is shown as 'auto' though if I
change it to something and then to 'auto' again, the image fills the screen
(i.e. the normal and expected situation). Magnification on 100% produces the
same size as just after start, 125% still less than the screen and 160% larger
than the screen. My native resolution and the resolution set in the options is
1920x1080, but the problems persist with lower resolutions too.