Recently, I change my laptop from old Thinkpad to newer laptop with much larger touchpad. I've found that I frequently touch the sensitive touchpad while I'm using emacs. And with some mysterious combination, very often there will be a highlight appear on the emacs buffer. The highlight is persist. Cannot be removed by navigating cursor or mouse click. It's not emacs selection mark. The only way I can remove it is to close the buffer and reload the file.
This is very annoying. Anybody know what is it, how to remove it, and best if I can prevent it from occur in the first place.