起動しないと思ってserial覗いたらOSイメージの作成失敗してた><
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Error: invalid dtb and unrecognized/unsupported machine ID
r1=0x00000c42, r2=0x00000000
Available machine support:

ID (hex) NAME
ffffffff Generic DT based system
ffffffff BCM2835

Please check your kernel config and/or bootloader.