Le 02/08/2018 à 10:10, Tyler a écrit : > So, > > Using: > > Xft.dpi: 220 > GDK_SCALE=2 > GDK_DPI_SCALE=0.5 > QT_AUTO_SCREEN_SCALE_FACTOR=1 > > xrandr --output DP1 --scale 2x2 --auto --pos 0x0 --primary \ > --output eDP1 --scale 1x1 --mode 3840x2160 --pos 5120x0 > > I noticed that Qt5 apps look now fine on my external screen (Low DPI) > but now super huge on my laptop screen HiDPI. > > I think the reason I avoided using QT_AUTO_SCREEN_SCALE_FACTOR and set > that to 0 was because it was being scaled twice (hence the super > hugeness on my laptop) as apparently it looks at the DPI in xrdb, but I > need that for rxvt, i3 etc. > > Without doing what you've done and dropping the resolution on my HiDPI > screen. I found this, using: > > GDK_SCALE=2 > GDK_DPI_SCALE=0.5 > > QT_AUTO_SCREEN_SCALE_FACTOR=0 > QT_SCREEN_SCALE_FACTORS=2 > > Single Screen Laptop: > > xrandr --output eDP1 --scale 1x1 --mode 3840x2160 \ > --output DP1 --off > > All good. > > Single Screen External: > > xrandr --output eDP1 --off \ > --output DP1 --scale 2x2 --mode 2560x1600 > > All good. > > Both screens! > > xrandr --output eDP1 --scale 1x1 --mode 3840x2160 --pos 5120x0 --primary \ > --output DP1 --scale 2x2 --mode 2560x1600 --pos 0x0 > > Small fonts on external screen with Qt5. > > xrandr --output eDP1 --scale 1x1 --mode 3840x2160 --pos 5120x0 \ > --output DP1 --scale 2x2 --mode 2560x1600 --pos 0x0 --primary > > Small fonts on laptop using Qt5. So it seems tied to Primary switch as > to which screen it scales for. Fortunately when using dual monitors I > basically never use virtualbox, wireshark or nvim-qt on the laptop screen. Ah, small fonts is something different: https://bugreports.qt.io/browse/QTBUG-67928
