@mrjj Yes, What I did was QFontDatabase::addApplicationFont("/usr/share/fonts/truetype/Open_Sans/OpenSans-Regular.ttf"); and then select "Open Sans" on the QtDesigner

@mrjj I check and tried to replicate what the sample does but still doesn't work. I do notice the sample code uses the font in QTextDocument. Not sure if it matters. Also, from the documentation, weight and italic shouldn't matter once you set the style name http://doc.qt.io/qt-5/qfont.html#setStyleName However, I got it to work by using QFontDatabase::font() which takes the style name.

I've created a task https://bugreports.qt.io/browse/QTBUG-50984 so it doesn't get forgotten.

I found that this application also has the same issue (same error message when doing the same thing): https://local.ugene.unipro.ru/tracker/browse/UGENE-5411

Hi, AFAIK, you can't when calling the static methods, it's also a native file dialog so it should follow your OS settings

Hi and welcome to devnet, Are you using a special font ?

This is correct. This will be most likely a Windows-related problem with the ttf font.

I found a workaround: Define environment variable within Qt application startup context: QML_USE_GLYPHCACHE_WORKAROUND = 1 Look on this topic: https://forum.qt.io/topic/39803/font-rendering-bug-on-some-android-devices/7

@mcosta Hi, I'll certainly take a look at it. So I guess it's not only changing the font xD Thank you.

thank you very much....

ty, I have downgraded some packages (libglapi-mesa f.e.) and reinstalled some others. nopw everything is fine!

Hi and welcome to devnet, What version of Qt 4.8 are you currently using ?