I managed to restore armbian to the board that couldn't boot.
The boards are this model.
The situation is this, now:
board 1:
Booting in Armbian, now clean, no overlay installed with armbianEnv.txt:
This board seems to be working, but eth0 seems to be on a different physical device from before all this trouble, meaning now the eth0 is on a different real ethernet port
board 2:
Booting Armbian, with armbianEnv.txt:
Same problem with the eth0
On both boards I have problems with detecting SD card via U-boot, while no problems from Armbian
I hope this clarifies the situation
[UPDATE]
I managed to get the SDs working, Uboot doesn't like when booted with the SD inserted, seem like....
Also, I physically disabled the 2nd ethernet port, now eth0 is where it should be, but still no connection...
[UPDATE 2]
I'm trying to get the ethernet to work, any of the two
This is the IP A printout:
$ ip a
>1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 72:e8:9e:60:82:ef brd ff:ff:ff:ff:ff:ff
inet 169.254.14.193/16 brd 169.254.255.255 scope link eth0:avahi
valid_lft forever preferred_lft forever
inet6 fe80::70e8:9eff:fe60:82ef/64 scope link
valid_lft forever preferred_lft forever
3: wlx8812ac17702d: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 88:12:ac:17:70:2d brd ff:ff:ff:ff:ff:ff