teknoid's post in Odroid C2 never starting after a soft reboot (reboot command) was marked as the answer
root@odroid:~# mount |grep mmc
/dev/mmcblk1p1 on / type ext4 (ro,noatime)
/dev/mmcblk0p1 on /data type ext4 (ro,noatime)
root@odroid:~# reboot
Failed to connect to bus: No such file or directory
root@odroid:~# client_loop: send disconnect: Broken pipe
hje@prime:~$
hje@prime:~$
hje@prime:~$
hje@prime:~$
hje@prime:~$ ssh root@odroid
___ _ _ _ ____ ____
/ _ \ __| |_ __ ___ (_) __| | / ___|___ \
| | | |/ _` | '__/ _ \| |/ _` | | | __) |
| |_| | (_| | | | (_) | | (_| | | |___ / __/
\___/ \__,_|_| \___/|_|\__,_| \____|_____|
Welcome to Armbian 24.2.1 Bookworm with Linux 6.6.16-current-meson64
System load: 46% Up time: 0 min
Memory usage: 7% of 1.82G IP: 192.168.25.252
CPU temp: 28°C Usage of /: 66% of 3.0G
fresh installation on emmc, reboot works fine.