eGalax touchscreen and RandR rotation

Sandeep sandy.8925 at
Fri Oct 4 17:36:00 PDT 2013


I have an Acer Iconia Tab W500. It has an eGalax touchscreen. Single touch
input  works.

I mainly use KDE, and when I rotate the screen using the Krandrtray
application, the mouse input works fine, but the touchscreen input does not
work correctly.

Here is a video showing the problem:

It looks like the touch driver rotates the input in the same way that the
screen is rotated, thus producing wrong/unexpected behaviour.

I tried searching for existing bugs at and it doesn't
look like any of them cover this problem. Does anyone know what the problem
might be, and how I can figure out where the problem lies?

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