Bad Display Name When Running Python Script On Boot With Touch Screen

Attempting to run a Python script on boot on Raspberry Pi 3B+ 1GB RAM, Raspbian, with a SunFounder 10' Touch Screen, - .log file returns 'Bad display name' Python script is 100% f

Solution 1:

Try to add DISPLAY environment variable before calling your script:

DISPLAY=":0" /usr/bin/python3 /home/pi/Custom_Scripts/<script>.py

Solution 2:

DISPLAY="/dev/null" /usr/bin/python3 /home/pi/Custom_Scripts/<script>.py

Have you tried a longer sleep?

Solution 3:

If you try to get your ip adress during your startup script with (for example) :

import socket
  def get_ip_address():
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        s.connect(("8.8.8.8", 80))
        return s.getsockname()[0]

you will get an errror like:

File "/usr/lib/python2.7/socket.py", line 228, in meth return getattr(self._sock,name)(*args) error: [Errno 101] Network is unreachable

This is because at reboot network is not necessarily available. In order to make it available see https://raspberrypi.stackexchange.com/questions/45769/how-to-wait-for-networking-on-login-after-reboot :

sudo raspi-config

then select option 3 Boot Options then select option 4 Wait for network at boot

Once you have done that networking should not be an issue at reboot.

You get also check for other ways to enforce network setup before running your script take a look at : https://askubuntu.com/questions/3299/how-to-run-cron-job-when-network-is-up

Solution 4:

If there are unforeseen ramifications for using this method, I will update this thread accordingly. I fixed this issue just by adding two lines to the autostart file which resides in /etc/sdg/lxsession/LXDE-pi/autostart.

sudo nano /etc/xgd/lxsession/LXDE-pi/autostart

Add these two lines, do not modify the existing code.

sleep 5
@/usr/bin/python3 /home/pi/Custom_Scripts/<script>.py

My autostart file looks like this:

@lxpanel --profile LXDE-pi
@pcmanfm --desktop --profile LXDE-pi
@xscreensaver -no-splash
point-rpi
sleep 5@usr/bin/python3 /home/pi/Custom_Scripts/<script>/py

Ctrl + O to write file

sudo reboot