The black screen will be the default openbox desktop and it would appear the chromium hasn’t started. If you attach a mouse and keyboard to your pi/kiosk you should be able to right click on the desktop.
It’s been some time since I used openbox but I think the right click menu would give you an option to open a terminal. Do that and try the chromium command string you have in your autostart file. That should show if the command is correct for your system
Also, when I did it previously on a SCADA system controlling gates. the autostart file had to be placed in /home/{USER}/.config/openbox/
I added the command “lcd_rotate=2” to /boot/config.txt because the display was showing everything upside down.
During the boot process, I noticed that the orientation rotated 180° again midway through, and everything was upside down.
So I connected an external monitor to the HDMI port.
Lo and behold… right-clicking works, and I can also manually start the Chromium browser.
It doesn’t look great yet, and it doesn’t happen automatically, but I’ve made some progress.
So, the to-do list would be:
1 Redirect output to the connected touch panel (instead of the external HDMI port)
2 Get Chromium to autostart and configure it
3 Presumably, also rotate the display 180° in OpenBox.
Sorry, didn’t really go online for the last few days. Sounds like you’ve made good progress, well done
My project was with an external HDMI. As I said when I did mine the autostart was in the directory path of your kiosk user that you have configured for auto login.