I am running Juno on a Dell Latitude e6410 that has had issues with the touchpad being super jumpy and jittery... I just discovered that it runs smooth as butter when it's not plugged in. I switched to a lower-powered adapter (65W) and it still seems to be smooth. What could be the cause of this? As far as I know, this laptop is supposed to have the 90 W adapter. UPDATE: I found this https://askubuntu.com/questions/309971/touchpad-doesnt-respond-when-power-is-plugged which seems to explain at least in some way what is happening.