Calibrate touchscreen

[JamesCullum]

Thank you for the easy to use package!

I am using a 5" touchscreen, which requires calibration to be precise.
For this, I need to install apt-get install xinput-calibrator (which works) and then go into the GUI to Menu-->Preferences-->Calibrate Touchscreen.

How do I get to the GUI where I could do this? I've noticed that startx is installed, but I assume focuses on Chrome.

Do you know how to get to this menu / get to the GUI in this image?

[jareware]

Hey, sorry for taking some time to get back to this, I've been away from the keyboard for a while.

I don't have a test device at hand right now, but have you tried just getting a terminal with Ctrl + Alt + F3, and running something like sudo DISPLAY=:0.0 xinput_calibrator?

[JamesCullum]

Hey @jareware, thank you for the response!

If I run your command, I get

No protocol defined
Unable to connect to X server

If I change the ID to 1.0 or 2.0 I don't get the No protocol defined, but the error connecting to X stays.

[jareware]

Uhh, interesting. Like I said, I don't have such a device at hand, and that makes testing quite hard. Wish I could be of more help.

Let us know if you figure it out!

[Kimmax]

Running xinput_calibrator using DISPLAY=:0 xinput_calibrator works. It's important to run this as a normal user, not root.

[jareware]

Great to hear!

By the way, are you guys talking about the official RasPi touchscreen module, or something else..?

[Kimmax]

I'm using a 10.1" 1280x800 "IPS LCD" (?!) Touch display from SunFounder. You can find it here.
It's a really cool display for all sorts of projects and looks modern and clean

[jareware]

Added your tip to first-boot.md, thanks @Kimmax!

[PoloB12]

xinput_calibrator is not included anymore in the image v2.1.0 ?

[Kimmax]

@PoloB12 xinput_calibrator was never included, install using apt-get install xinput-calibrator

[PoloB12]

I assumed it was installed as was mentioned in first-boot.md ; had installed manually already, thanks.

Had some issues calibrating a rotated screen though, I found this link very helpful solving that :

https://gist.github.com/KurtJacobson/37288a0300a9c1b3e859c8dcff403300