Maybe I am missing something here. But after installing QT6, or using some apps that require QT6, the toolbar icons are not rendered.
I attach an image with an plot while using octave and setting graphics_toolkit("qt").
This same behavior happens with other QT apps, e. g., Master PDF Editor.
I've also installed a suggested package libqt6svg6, without luck.
Moreover, with QT5 there were no issues.
I suspect that I need to install package. But I do not know which one.
Any help is more than welcome.