On Tue, 2008-11-25 at 18:54 -0500, Richard A. Smith wrote: > During SJ's demo meeting today at 1cc I used my test machine with the > new touchpad. > The touchpad on my laptop is much deeper inset than > I still experienced jumpyness. However, a much different jumpyness > than what happens with the alps device. In my case it appears to happen > if the tip of my thumb gets up into the active area. (Creepage from > using it to click thThe touchpad on my laptop is much deeper inset than > e X button) What I saw was the cursor would leap to the edge of the > screen which is similar to what happens with the current pad, but unlike > the current pad its does not continue to leap around. It a one shot and > then returns to normal movement. This happened to me several times. > > So then I played with my HP laptop which also has a synaptics touchpad > and I'm able to duplicate the same behavior.
It's worth a gander at the upstream synaptics driver; I've seen some patches go by recently. > > So even with the new touchpad we still may have to have some sort of > criteria for discarding packets with large deltas for the movement. > > By default in mouse mode the values reported by the device are relative. > So some sort of edge effect must confuse the controller. I need to > enable some logging and see what data the device actually sent. > > I've also noticed that the acceleration of the new touchpad is much less > than the alps device. When you switch from new to old the you can > really tell. We should reduce the acceleration of the cursor for the > alps device. Its not necessary to be that fast. > Yeah, the acceleration stuff in X sucks. Fixed in next release, IIRC (after something like 20 years...).... > Is that something we can set defaults for in the X config or do we have > to detect what touchpad we are running? > Unfortunately, we'll have to detect it. This whole are of X is being reworked as we speak.... Upstream, everything is hot plug, and you can then set things on a per detected device basis. - Jim -- Jim Gettys <[EMAIL PROTECTED]> One Laptop Per Child _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel