On Mon, Nov 24, 2014 at 09:57:46AM +0100, Sebastian Andrzej Siewior wrote:

On 11/21/2014 02:10 PM, Richard Cochran wrote:

quoted

On the BB white using the LCD4 cape and the shipped debian kernel, the
cursor *does* jump away, but not as often or as far as on the custom
design I was working with.

This sounds like the ADC is still sampling while the input data becomes
invalid. Usually there is a resistor on the wiper line and the
touchscreen manual says how much it should be at least. Could you
please check if this is properly installed?

Wiper line? This is a four wire device.

Thanks,
Richard