Datasheet

On my first run of startx I get a window saying "GDBus Error.org.Freedesktop Policy Kit1 Error: Failed Cannot

determine user of subject"

This happens on the Raspberry Pi the first time you run startx, no matter what display. You can just re-start X and it

wont appear again.

Can I get a right-click from the touch-screen?

Yes! Please see this post:

https://forums.adafruit.com/viewtopic.php?f=47&t=77528&p=393280#p393322

I'm having difficulties with the STMPE resistive touch screen controller

Here's a hack for the device tree overlay that can force different SPI modes, sometimes that helps!

My PiTFT's rotation/calibration isn't working in X11

X11 (the graphical system) has changed how it gets touchscreen input, so if you rotate the display and the calibration

isn't being picked up:

Check /usr/share/X11/xorg.conf.d for a file called 10-evdev.conf

If you don't see that file

1. You need to sudo apt-get install xserver-xorg-input-evdev , and then...

2. If you do have a 40-libinput.conf in that same directory, you must remove it even if/once evdev is installed,

since it will override the 10-evdev.conf otherwise.

Thanks to cerebrate in the forums for the hint!