Qt library installed on Ubuntu 13.04 amd64 desktop by online installer haven't support for touchscreens. Probably because it was built without Xi2.
|For Gerrit Dashboard: QTBUG-35583|
|74357,5||xcb: added env variables to show input devices and events||stable||qt/qtbase||Status: MERGED||+2||0|
|74565,1||xcb: added env variables to show input devices and events||dev||qt/qtbase||Status: ABANDONED||0||0|