New method for rotating touch surface

[Jofemodo]

Hi Mark!

I've been trying to rotate the touch device as described in documentation:

xinput --set-prop 'ADS7846 Touchscreen' 'Evdev Axis Inversion' 0 0

But it doesn't work anymore with recent kernels. As you can read here, there is a new method:

https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=172025

Following this instructions, this command works for me (rotate 180º):

xinput --set-prop 'ADS7846 Touchscreen' 'Coordinate Transformation Matrix' -1 0 1 0 -1 1 0 0 1

You can find a detailed description of this "Coordinate Transformation Matrix" here:

https://wiki.ubuntu.com/X/InputCoordinateTransformation

Please, update the documentation ASAP to avoid other users getting confused with this.

Thanks!

[Mark Williams]

thank you for this.
I will update the information

Mark --OzzMaker.com --

[Some Guy]

after that got black screen on loading

[Author]

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