I have a new Raspberry Pi 4 connected to a motherboard that supplies very stable voltage and current to the Pi. I flashed an SD card with the latest distro and realized that sometimes when I run
shutdown -r now from the command line, the Pi does not boot. The green LED blinks 7 times showing that the board is unable to find "kernel.img" (according to this resource). The Pi always boots successfully from a powered-off state, but not when rebooting from software.
- Raspberry Pi 4B, 2GB RAM.
- Raspberry 7" Touchscreen.
- Raspbian distro: 2020-02-05-raspbian-buster.
- SD card: Samsung EVO Plus 32GB
I have already read this topic that deals with Pi 4 boot issues. The Pi 4 related post says this:
Shortly after launch there appeared to be an issue with some 32GB cards that expressed itself with that the boot aborts. The four raspberries appear followed by a short burst of text, then the system halts. The base of the issue seems to be the card reader of the PC used, but later firmware seems to have solved the issue: https://www.raspberrypi.org/forums/view ... 8&t=248968 in the meantime, if you have this exact problem, I would suggest using a 16GB card, try using another card reader, or upgrade the boot code.
However, the post is dated Jun 25, 2019, and there've been already 2 releases of Raspbian Buster since then, so I guess it's not related to the SD card problem. Furthermore, I have already flashed the SD card using a new reader/programmer and, as I said before, boot always succeeds when booting from a powered-off state.