My ThinkPad Twist Touchscreen sometimes is unresponsive after the system wakes up from suspend or sleep mode. Sometimes it works but then stops for a while and then starts working again. It usually starts working after 3, 5, 10 or 15 minutes. I cannot pinpoint exactly what makes it start or stop, it is very random. I hope Lenovo will fix it soon, it is a great machine otherwise.
Lenovo has a firmware update for the touchscreen that is in process of being released through our support site. Since there could be multiple causes as discussed elsewhere in the forum the firmware update may or may not be be the solution for all possible causes.
Download the file attached to this article and rename it from .abc to .exe. It has been named .abc to get around some limitations with attaching executables and various anti-virus packages which would block it. To install, be sure AC is attached and double click the file after you have renamed it.
After this update, many customers note that the screen feels more responsive and accurate.
After renaming to an .exe file, you need to right-click on the file and "unblock" it so that it could install. Be sure to reboot after installing.