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have anyone measured power consumption of the newly-introduced "off" state via long-press of the Fn-F10 combination on the Raspberry 400 model?

https://www.raspberrypi.org/blog/designing-raspberry-pi-400/

"We also have a feature that is completely new to Raspberry Pi products: an on/off button! Power off is achieved by holding down Fn+F10 for two seconds. This is a soft control that negotiates with Linux to shut down, so you don’t corrupt your memory card or your USB drive. Power can be restored by pressing F10 (or Fn+F10)"

https://www.raspberrypi.org/blog/raspberry-pi-400-the-70-desktop-pc/

"It uses the Holtek keyboard controller to enter (and exit) an ultra-low-power mode where the main PMIC is completely powered down."

Looking for my pre-order... Thanks.

lzap
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1 Answers1

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A similar question has been asked and answered for the RPi 4. I have also posted a more detailed account on GitHub.

You won't find anything there on the 400. I would guess that the hardware and firmware relevant to this question are not too different between the 400 and the 4 - but that will always be a guess because the Raspberry Pi Foundation has chosen not to disclose either the hardware design or the firmware design. I'll avoid temptation to rant here - this is the sad but true situation.

Anyway - I'll guess that when the power consumption is measured in the 400, it won't be substantially different than the 30-40 mA we currently see on RPi 4.

Seamus
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