HiDPI mode

Hi Jon,

for me your problem is you use a oldest Fedora version released in ....  november 2015.
What is your Desktop environment, Gnome 3.18 ... KDE, Xfce, LXDE, Mate-Compiz, etc ?
Please upgrade to Fedora 24 if you can.

Laurent

Your laptop run in normal mode into a resolution mode 1920 x 1080 or in HDPI? 
1920 x 1080 is a normal resolution.
What your HP Spectre specification?

If you want to use HDPI for your laptop you need to upgrade Qt 5 version to Qt 5.6.
In code, I was added a control for verify if Qt version >= 5.6 for enable HDPI support for QET or not.

http://rpms.remirepo.net/rpmphp/zoom.php?rpm=qt5-qtbase

Laurent

Jon,

I think you must reporting to mainstream Remi Collet this bug.
It 's very strange, I've never heard about this problem recently on Ubuntu or Debian with latest Gnome shell !

Laurent

Hello guys,

I've bought a 4K display and I've realised that HDPI auto scale doesn't work properly, at least for me. I suggest you to disable this feature in .desktop file modifying the Exec line like this.

Exec=env QT_AUTO_SCREEN_SCALE_FACTOR=0 qelectrotech %F

Perhaps you can release the next version with two desktop files, a normal one and HDPI disabled one.

I've created a desktop file like this:

[Desktop Entry]
Version=1.0
Name=QElectroTech 
TryExec=qelectrotech
Exec=env QT_AUTO_SCREEN_SCALE_FACTOR=0 qelectrotech %F
Icon=qelectrotech
Terminal=false
Type=Application
MimeType=application/x-qet-project;application/x-qet-element;application/x-qet-titleblock;
Categories=Graphics;Qt;VectorGraphics;Science;Electricity;Engineering;
Keywords=Graphics;Science;Electricity;Engineering;
Comment=Edit electrical diagrams.
GenericName=Electrical diagram editor

Best regards

https://vicrucann.github.io/tutorials/osg-qt-high-dpi/
But :

http://doc.qt.io/qt-5/highdpi.html

You could try latest svn ubuntu packages?
https://launchpad.net/~scorpio/+archive/ubuntu/ppa
0.60.r4962

I reverted it after. 

-#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
-QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
-#endif
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0)
+    QApplication::setAttribute(Qt::AA_DisableHighDpiScaling);
+#else
+    qputenv("QT_DEVICE_PIXEL_RATIO", QByteArray("1"));
+#endif // QT_VERSION
     return(QETApp(argc, argv).exec());
 }