We have several gumstix overo with chestnut expansion board and LCD touch screen.
They boot OK and display the default desktop, but the touch screen is virtually unusable.
It is even a challenge to run the calibration utility (forced by removing /etc/pointercal). I had to resort to using one of the gumstix aerials as a stylus, as the touch screen would not accept any of my finger presses.
We are using a pre-built image from October 2010:
$ uname -a
Linux gumstix1 2.6.34 #1 Wed Oct 13 12:00:38 PDT 2010 armv7l GNU/Linux
Overo # printenv
How can I fix this?