Hi, tl;dr section at the bottom. During Leap 15.0 development, a focus was on the experience with HiDPI (>96 pixels per inch) monitors. Some bugs got reported which indicated that there were some issues especially in mixed-DPI environments. While they generally work fine after some (extensive) manual configuration, the automatic configuration wasn't quite that good. Fixing this will also improve the experience during the installation (no manual configuration possible) and on desktops which don't have a UI to configure it. X was not designed for HiDPI and especially not mixed-DPI environments. It has only a single dpi specifier for the whole screen (spanning all monitors) and it is on all drivers, except the proprietary Nvidia driver, 96x96dpi. Each monitor geometry is available via XRandR though. Now Qt comes into play: It uses the screen DPI (so 96dpi) as global DPI and applies per-monitor scale factors on top. There is a font scale factor which is computed by (screen DPI)/(primary monitor DPI). If your primary monitor has 96dpi and your secondary 192dpi, it results in a 1x font scale and 1x/2x scale factors, as expected. If you set the 192dpi monitor as primary though, it gets ugly: The font scale is now 96/192 = 0.5x and 1x/2x scale factors mean that applications on either monitor are half of the expected size (1x on the primary and 0.5x on the secondary). This is reported upstream as https://bugreports.qt.io/browse/QTBUG-67928 The solution: Ignore the 96dpi which X reports by default and only use the monitor geometry as scale. The good: The font size on HiDPI and especially mixed-DPI environments is now scaled by default. The bad: You might unintentionally rely on the 96dpi X reports if you have a HiDPI monitor but keep applications unscaled. That requires manual configuration now. The ugly: If you have a primary monitor with != 96dpi, this is a behaviour change and results in changed appearance of applications. YaST for example uses bigger fonts, but the UI elements stay the same size. tl;dr: Look out for changes in application appearance and report any bugs. If you have a HiDPI system with custom configuration for DPI or scale, try to reset it to the defaults again and check whether it behaves as expected. You can revert to the old behaviour by setting "Xft.dpi: 96" (most configuration dialogs call it "Force font DPI") or by setting QT_FONT_DPI=96 in the environment. Cheers, Fabian -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-factory+owner@opensuse.org