IoTBox - POS Client Display not working without HDMI

[kess78]

Impacted versions:

• Odoo 13
• IoTBox 20.02

Hardware in use:

• Raspberry Pi 3 Model B+
• Raspberry Pi 7" Display https://www.raspberrypi.org/products/raspberry-pi-touch-display/
• SD Card

Steps to reproduce: Detach HDMI Display and only use RaspberryPi 7" LCD connected with ribbon cable (so no devices connected to HDMI)

Current behavior: Black Screen is shown

Expected behavior: POS Client Display is shown

Hello guys, I'm facing the problem described above. I use the image iotboxv20_02.img with a Raspberry Pi 3 Model B+
The system boots up correctly, I can see the boot procedure with all the startup messages on the 7" LCD Display.
Then X11 starts up and the LCD remains black, POS Client display is not shown.

It only works when I boot the IoTBox with an HDMI Display attached to the Box. Then the POS Client Display is correctly shown on the LCD.

If you need any further informations please let me know.

[eguane]

Same issue/question with pi4 and latest IOTBOX iso.
Why consider only hdmi lcd screen... ?
I'am looking in displaydriver.py and find this in connection_type self.device_connection = 'hdmi'
Rgds

[qle-odoo]

Hello,
we don't use these screen because it is not a "plug and play" solution like a hdmi screen.

You can modify the driver to list your lcd display in this loop
https://github.com/odoo/odoo/blob/13.0/addons/hw_drivers/controllers/driver.py#L408

[eguane]

Hello, thank for your suggestion but no idea how to proceed.
Rgds

[odaybari]

Hello eguane,
Have you managed to solve this. I am having the same issue with a usb-c display. When I connect a 7 inch displaylink everything load except the browser (firefox-esr).

Can please someone tell me where can I find the startup script that checks if there is a HDMI connection? I would like to replace the HDMI by /dev/fb1.
Thanks