Comment 34 for bug 631464

@anshuiitk: Run lsusb to see whether you have the N-Trig hardware. Maybe Lenovo has more than one vendor for this stuff, so do this first. If no N-Trig device is listed, your problem is unrelated to this issue. If it is, run lsmod to see if the hid_ntrig driver is loaded. If it's not there, run

grep ntrig /etc/modprobe.d/*

to see if anyone blacklisted it. In that case, comment out the blacklist with a # and reboot. If lsmod shows hid_ntrig, you should get touch.