title: Qt overriding the tslib calibration constants
body: <p>I am running Qt application on F&amp;S armStone a9 board. The application is overriding the ts_calibrate generated constants so that even when I try bad calibration of the touch screen the application is working. What I want is to use the filters generated by tslib? How can I force the qt to use the tslib</p>
  
  <p>I have tried configuring the following environment variables</p>
  
  <pre><code>export LD_LIBRARY_PATH=/usr/lib
  export TSLIB_TSEVENTTYPE=INPUT
  export QTDIR=/usr/lib/qt
  export QWS_MOUSE_PROTO=tslib:/dev/input/event1
  export TSLIB_CONSOLEDEVICE=none
  export TSLIB_FBDEVICE=/dev/fb0
  export TSLIB_CALIBFILE=/etc/pointercal
  export TSLIB_CONFFILE=/etc/ts.conf
  export TSLIB_PLUGINDIR=/usr/lib/ts
  export TSLIB_TSDEVICE=/dev/input/event1
  export QWS_DISPLAY=LinuxFB:mmWidth=800:mmHeight=480
  </code></pre>