François Patte wrote: > John Wendel a écrit : >> On bottom, it says Logitech optical mouse, it's not a laser, just a red >> led, connected to the PS/2 mouse port through an adapter. NO KVM involved. > > Yes, led! not laser of course! I had some problems like this, until I > put my mouse on a sheet of paper... I think that if the mouse is on a > too much reflective place, then it has a weird behaviour. > It is more a matter of the contrast the reflexion. It has to sense changes in reflected light to determine motion. I have a very reflective mouse pad left from an early optical mouse that has nice grid lines on it - it works great! (The original mouse would only work on the special pad.) Mikkel -- Do not meddle in the affairs of dragons, for thou art crunchy and taste good with Ketchup!