Comment 1 for bug 731642

Thanks for your bug report. Yes, some more information would be helpful. Please post

1) an xev log file of a click, including button press and release event (no drag and drop)
2) /var/log/Xorg.0.log to make it easier to find the touch screen driver

There is one thing you could try to mitigate the problem.

$ gksu gedit /usr/share/pyshared/Onboard/KeyboardGTK.py
$ in line 49: self.click_timer = gobject.timeout_add(20, self._cb_click_timer)
- try to lower the number 20 down to 10, 5, 1, or even 0 (high cpu usage)
- Save and restart onboard
- Report back the highest number that still works reliably for you (if there is one)