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 Touch seeded packages, which is subscribed to unity8 in Ubuntu. https://bugs.launchpad.net/bugs/1642272 Title: Incorrect UI scale on high-resolution desktop (everything is gigantic) Status in Canonical System Image: New Status in Mir: Invalid Status in unity8 package in Ubuntu: Confirmed Bug description: On a hidpi display, the unity8 desktop session in 16.10 has an oversized and inconsistent UI scale. The unity8 session is absolutely not usable for testing (because there is not even enough screen space to display the logout menu item). The shell+cursor is rendered with a UI scale of at least 2× the correct scale (e.g. 4× the scale of a low-dpi display). Due to this the indicator menus collapse immediately after clicking because they are larger than the screen height. The content of the scopes window is rendered with 4× the correct scale, giving space for only one icon. In unity 16.04, the correct scale could be achieved by setting "export GRID_UNIT_PX=16" in .bashrc, however this has no effect anymore when I remove or change it. The issue is also in the guest session. Ubuntu version: 16.10 (fresh install) unity8 version: 8.14+16.10.20160 amd64 physical resolution: 3200×1800 resolution used by unity8: 3200×1800 (at first sight I thought it selected a low resolution, but in fact fonts are very sharp). To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1642272/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
