I discovered: Initially, I had set environment variables in .bashrc for manually triggering the UI scaling of Qt5, Java, etc. During debugging of this issue (as instructed above) I **commented them out** and after loout/login, the incorrect UI scale persisted.
Now I noticed that QT_DEVICE_PIXEL_RATIO=2 and QT_AUTO_SCREEN_SCALE_FACTOR=2 were still set automatically during the boot/login process. Instead of commenting them out, I then set them to 1 in ~/.bashrc but they still were overriden. QT_DEVICE_PIXEL_RATIO=1 QT_AUTO_SCREEN_SCALE_FACTOR=1 GRID_UNIT_PX=20 Then I set them in ~/.profile and they were not overriden. Moreover, the unity8 session (8.14+16.10.20160922-0ubuntu2) renders in the correct scale and digikam (5.4.0, Qt 5.7.0) as well. It seems like a Qt API break so that not only these variables are not needed anymore for new programs, but their presence now has the inverse effect. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1642272 Title: Incorrect UI scale on high-resolution desktop (everything is gigantic) To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1642272/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
