Seems to be the same problem these people are experiencing, so their efforts so far may give a better idea as to what's going on.
http://www.mail-archive.com/debian-laptop@lists.debian.org/msg47874.html -- Synaptics touchpad ceases functioning after suspend and resume. https://launchpad.net/bugs/59867 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
