Installer shows error:
./qt-unified-linux-x64-4.4.1-online.run: error while loading shared libraries: libxcb-xinerama.so.0: cannot open shared object file: No such file or directory
to make it work, we must install xcb-xinerama:
sudo apt-get install libxcb-randr0-dev libxcb-xtest0-dev libxcb-xinerama0-dev libxcb-shape0-dev libxcb-xkb-dev