Raspberry Pi 4 (with emteria.OS v11.2.0) shuts down if no display connected
I have 2 devices connected to a display over HDMI. 1 device is a Raspberry Pi 4 (with emteria.OS v11.2.0) and the other one is my workstation. I use a HDMI switch to toggle between these 2 devices. When I toggle to my workstation and after a few seconds back to the Raspberry Pi, then the screen is black and shortly after I see the Emteria splash screen. It turns out that the Raspberry Pi shuts-down as soon as it detects that the HDMI monitor is gone.
Q: Is there a way to prevent this shut-down?
FYI, the Raspberry Pi 4 is constantly powered over the USB-C port by a 5V/2.1A power supply.
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Hey @Marlon ,
That's expected Android behaviour. The main internal display is expected to be always connected to the device.
Currently, there is no way to prevent this shut-down. Is it just out of convenience or crucial for your use case to switch the screen?
Hi @smieschek ,
. If we need to access them, then we use VNC (at least on the older set-ups that do have Raspberry Pi 3B's) to connect to them.
Thank you for your reply. We are using the Raspberry Pi's in an automated test environment to test our end product. Those set-ups are located in a different area. Now I'm using a HDMI switch because I'm working on the transition from Raspberry Pi 3B to Raspberry Pi 4.
For our automated test set-ups we prefer to not have any monitor connected to them (we hardly do not use the UI). It saves in the electricity bill
A short update on the topic for everyone interested: the latest nightly for RPi4 should include the headless boot support.