Raspberry Pi 400 • Pi 400 boots only from one of the two USB 3.0 ports

PI400 is running fine and booting from the USB 3.0 Port next to the USB-C Power input.
Booting from the one and only USB 2.0 port is also working fine (speeds are just 10% of course).

But when i try to use the middle USB3.0 Port (between the other two working USB Ports) the Pi 400 does not boot up.

Sometimes it stuck on the rainbow screen, sometimes it get stuck somewhere in the upfloating boot command lines, showing during boot process (splash screen disabled). Error messages showing a bunch of errors like ext4 filesystem error, usb error and so on. However, after that powering down the pi400 and using one of the other USB-Ports and the pi is booting up fine.

I think i read somewhere, that the Pi is disabling the Power of all remaining USB devices during boot process from Mass storage devices?
Maybe to ensure, the boot device has enough power during powering up. (spinning on old 2,5 HDD). Is it documented, that the PI400 can only use the USB3.0 Port next to the Power port for booting?

What i have tryed so far:
sudo -E rpi-eeprom-config --edit and there added the line: USB_MSD_PWR_OFF_TIME=0
was not succesfull.

Statistics: Posted by unexpected_user — Sat Nov 23, 2024 4:10 pm — Replies 0 — Views 6

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