RaspberryPi 3 freezes on single user mode (init 1)

[sVx]

Hi,

I've installed RaspBSD (FreeBSD-aarch64-12.0-GENERIC-320146M.img) on an
4 GB microSD-Card for a RaspberryPi 3. So far it boots and runs fine but I would like to expand the root slice (the only slice)
over the full disk space but I cannot enter single user mode.

Un-commenting in /etc/rc.conf 'growfs_enable="YES"' and rebooting has no
effect. So I tried the manual way via `gpart resize /dev/mmcsd0s2` but
growfs(8) cannot expand root because root is mounted -- I guess. So I
tried `init 1` which just directly freezes the system as well as
`nextboot -o "-s" -k kernel` which hangs right after detecting the
keyboard. Guess in both cases it just freezes.

Don't know what are the dos and doen'ts for mailing lists and I
felt uncomfortable to put the full dmesg into the email. So I've
uploaded it here so far to http://textuploader.com/dku3j (So in case
you expect it to be directly on the mailing list I can still send it.)
Don't know what else to supply because I cannot even see a core dump.
(Only checked in root directory.)

Anyway for obvious reasons the dmesg is from from multiuser but I Could
supply a real screen shot for example.

How do you proceed  from here or what do I miss maybe?

Best regards
sVx