I get this, too. I've found that if the left-mouse button stops working (on my external mouse), then if I click on the touchpad left-mouse button, all reverts to normal. It seems to be stuck in some sort of selection mode (sometimes text highlights as I move the mouse).
I get this, too. I've found that if the left-mouse button stops working (on my external mouse), then if I click on the touchpad left-mouse button, all reverts to normal. It seems to be stuck in some sort of selection mode (sometimes text highlights as I move the mouse).