Problem with touch screen and touch pad when laptop is closed and use external monitor

Hello,

I had the following experience which made me uninstall Ubuntu 14.04 LTS

I have HP Envy 17 j100 and it has a touch screen. Installation worked fine. Unfortunately the I use external display (external mouse and keyboard) and I close the lid of the laptop seems the tocuhpad is interfering with the touch display. As result there is a constatn focus on one point on the screen as if the "right mouse button" is constantly pressed. Moving the external mouse results in selecting elements. Pressing excape on the keyboard deselects the selection but the same repeats as the touchpad is touching the screen.

Thinking on this seems, when the display is off due to being closed the touch functionality is not turned off.
I assume once the LCD is turned off, all associated functionality with the display should be off also, including the touch screen.

Does this sound as a bug to you ? How can i register this so it is fixed and I can go and install again Ubunto on my new pc.