Setup: Troubleshooting

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Paul de Vries edited this page Feb 12, 2017 · 31 revisions

Whitescreen

This indicates your driver is not working, please consult your touchscreen maker for installation instructions.

Boots to Blackscreen

X11 is using the wrong framebuffer for displaying TouchUI.

Run sudo nano /etc/X11/xorg.conf.d/99-fbdev.conf
if file/path does not exist then create it
Find the following code:
```
Section "Device"  
  Identifier "touchscreen"
  Driver "fbdev"
  Option "fbdev" "/dev/fb1"
EndSection
```
if not found, paste the code into the file
if found, replace /dev/fb1 into /dev/fb0 or /dev/fb0 into /dev/fb1
Save & Exit (CTR-O, ENTER, CTR-X)
Run sudo chmod +x /etc/X11/xorg.conf.d/99-fbdev.conf
Reboot

* if the file does not exist, update your bootloader!.

Calibration

Update your bootloader!.
Read https://wiki.ubuntu.com/X/InputCoordinateTransformation
Create a new file touch ~/TouchUI-autostart/calibration.sh
Edit the new file nano ~/TouchUI-autostart/calibration.sh
Copy su $TOUCHUI_USER -c "xinput set-prop 'YOUR DEVICE NAME' 'Coordinate Transformation Matrix' 0 1 0 -1 0 1 0 0 1"
Replace 'YOUR DEVICE NAME' and the coordinates with the instructions from the ubuntu wiki.
Save & Exit (CTR-O, ENTER, CTR-X)
Reboot

Inverted touch Y/X axis

Make sure you followed the Calibration part first!
Edit the calibration file you made sudo nano /etc/X11/xorg.conf.d/99-calibration.conf
Add the following line before the EndSection that you copied from the calibration:

For inverting horizontal axis
```
Option "InvertX" "true"
```
For inverting vertical axis
```
Option "InvertY" "true"
```

Webcam image not working

Download and install the plugin SnapStream (also available in the plugin manager)
Configurate the settings:
1. Open a browser and type http://pi-ip-adrress:8080/?action=snapshot.
  If this works, then replace /webcam/?action=snapshot with /?action=snapshot and save
2. If that didn't work, then try http://pi-ip-adrress:8080/webcam/?action=snapshot
  In that case, SnapStream should work straight out of the box

Calibration (OLD METHOD / NOT WORKING WITH LATEST JESSIE BUILDS!)

Stop TouchUI with sudo service touchui stop
Run curl -sLS https://apt.adafruit.com/add | sudo bash
Run sudo apt-get install -y xinput-calibrator
Run sudo xinit ~/TouchUI-autostart/calibration.xinit*
Follow the calibration steps
After you completed step 6, pay attention to your command line, because it will show a wall of text with at the bottom instructions, please copy Section until Endsection and follow step 7
Exit by pressing CTR-C
Run sudo nano /etc/X11/xorg.conf.d/99-calibration.conf and replace the file with the copied Section code from step 6.
Save (CTR-O, Enter, CTR-X)
Reboot