#RaspberryPi – How To enable auto start with #HDMI safe mode

Hi!

A couple of days ago I wrote (a personal reminder post) about how to add automatic connect to Wi-Fi and SSH enabled in a bootable Raspbian image in a SD card (see references). I also explained that this was required for me because, by default Raspberry Pi 4 video ports were not starting with a 1920 x 1080p resolution.

Important: Remember that now, the 2 video ports supports 4K !

I was digging and reading about this, and I found another quick fix to solve this problem. Once you had a Raspbian image in a SD card, you can edit the file [config.txt] for some amazing cool tweaks! (Also, see references)

For me, my main change was in the [hdmi_safe] parameter. Setting hdmi_safe to 1 will lead to “safe mode” settings being used to try to boot with maximum HDMI compatibility.

# uncomment if you get no picture on HDMI for a default "safe" mode 
hdmi_safe=1

With this, the device will start automatically in a safe and standard mode. And, yes, it will work with my old and crappy test monitor!

Happy coding!

Greetings @ Toronto

El Bruno

References

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