I bought a rpi 5 and am booting into it using USB, no SD card. I am using this headless, so I want it to automatically boot into USB after a power outage. However when I tried switching of the power using my witch board and switching it back on, the pi doesnt boot unless I manually press the power button on my rpi5, its just red led(no blinking), after I press the power its green and boots. How do I make my rpi5 boot when there is a power supply without me manually pressing the power button.

  • does your RPi boot from SD card?
    – jsotola
    Commented Jul 1 at 19:15

2 Answers 2


I don't think raspberry pi can auto boot after a power outage

  • 1
    Why do you think that?
    – Seamus
    Commented Jul 2 at 4:21

To boot from a USB source without resort to the "power button" requires that you use the "official" Rpi 5 power supply.

I've not confirmed this through testing. I read it (somewhere) in the "official" documentation, and cannot find it now. Instead, I used this post as my reference. It is possible that the RPi Organization has changed the firmware that controls this... but we don't know much about that firmware as it is proprietary.

  • NOT true- my Pi5 boots from a generic 2.5A supply when powered.
    – Milliways
    Commented Jul 2 at 6:13
  • It may surprise you but I do have a life apart from Pi and have been busy. I do not use USB boot (frankly I don't understand why you would want to - sdio is faster) but in the interest of accuracy I just tried and it does work with USB and I can see no reason why it wouldn't (unless you are using a HDD attached via USB which requires high current). There are more urban myth posts about Pi than fact.
    – Milliways
    Commented Jul 4 at 10:42
  • @Milliways: In other words, you don't really know whether the "boot from USB" factor makes a difference or not. I guess you just thought it would be fun to stop by, and throw a rock or two... while you weren't busy I guess.
    – Seamus
    Commented Jul 5 at 3:01

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