Pinebook Pro, NetBSD 9/HEAD not booting

[Georg Bege <georg@bege.email>]

Hello World,

Im trying to install NetBSD to an Pinebook Pro,
but neither
NetBSD-9-aarch64-202211230500Z-pinebook-pro.img.gz

nor
NetBSD-HEAD-aarch64-202211231210Z-pinebook-pro.img.gz

work at all.

With the 9 image, I don't see a screen and I think it either doesn't
boot up at all or crashes.
With the HEAD I see at least the kernel booting (very fast, green
lines) but then the display gets blank.
For a while it seems as the device responds as I can control Numlock
and capslock (which emits LEDs).

After waiting quite some time it just reboots (kernel panic?).
Since I've no display I don't know what's going on,
has anyone tried an image recently which works?

best regards,
Georg