BeagleBone Black doesn't boot without serial console (10.0 release)

["Dr. Nicola Mingotti" <nmingotti%gmail.com@localhost>]

Hi,

Running NetBSD-10.0 release in BeagleBone black

I detected this problem, the system does not boot if I remove the serial 
console.
I have not HDMI nor keyboard, this system must be headless, serial console
is just for installation/debug.

The system runs from microSD, i wiped emmc to be
sure it doesn't try to boot from there.

If i keep the serial console attached (3 cables in connector J1) all works.
Reboot, poweroff, poweron, all ok.

If i remove the searial console from the J1
and i poweroff + remove power + give power, the boot stops,
i reconnect the serial console and i see this:
-------------------------------

Bad character
netbsd:cpu_Debugger+0x4:        e12fff1e
db{0}>
netbsd:db_machine_init: e30a3338
db{0}>
netbsd:db_machine_init+0x4:     e34830aa
db{0}> help
b               delete          match           search          w
break           dmesg           next            set watch
bt              dwatch          p               show whatis
c               examine         print           sifting write
call            exit            ps              step            x
callout         help            quit            sync
continue        kill            reboot          trace
d               machine         s               until
db{0}> boot
No such command: boot
db{0}> quit
Fri Oct 11 10:54:08 CEST 2024
Starting root file system check:
/dev/rld0a: file system is clean; not checking
fdisk: Cannot determine the number of heads
Not resizing /: logging unsupported
Starting devpubd.
Setting sysctl variables:
ddb.onpanic: 1 -> 0
Starting file system checks:
/dev/rld0e: 606 files, 25957 free (25957 clusters)
Loaded entropy from /var/db/entropy-file.
Waiting for entropy...done
...
-------------------------------

So if i just type 'quit' the system resume booting correctly.

Is there a configuration to make it boot ?

If there is no other way i will use CURRENT but this baby
goes in production, I wish to see it working for years,
i guess i have better chances with RELEASE.

please let me know

bye
Nicola