How to get OpenGL acceleration on X11?
-
http://qt-project.org/doc/qt-4.8/qtopengl.html is independent of the window system.
-
Both Qt Quick 1 as well as the QWidgets do not profit too much from GL acceleration. In one case a QWidget UI of mine was even slower with GL than it is with the raster graphics engine.
That is the reason for having Qt Quick 2 in Qt5, which does profit a lot more.