eGalax touchscreen and RandR rotation

Peter Hutterer peter.hutterer at
Mon Oct 21 14:41:22 PDT 2013

On Fri, Oct 04, 2013 at 05:36:00PM -0700, Sandeep wrote:
> Hi,
> 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?

what driver are you using? no X driver currently rotates with the screen,
it's something that needs to be triggered from the outside so chances are
that whatever triggers the rotation in KDE is triggering the wrong thing.


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