On Wed, 26 Nov 2025, Nenhum_de_Nos wrote:
November 19, 2025 at 3:56 PM, "Doug Moss" <[email protected]> wrote:
First, my appreciation to developers for getting Raspberry Pi 5 working
with OpenBSD.
Quirk#1: I wanted to re-affirm that serial console from GPIO
(which works for Raspberry Pi 4 on pins 6,8,10)
does not work for Raspberry Pi 5.
Fix#1: Instead, UART header using JST SH 1.0 is necessary
https://www.adafruit.com/product/5755 worked for me
connected to a FT232R serial-to-USB
with speed 115200
Quirk#2: the 7.8 release does not boot on RaspberryPi 5
using install78.img from pub/OpenBSD/7.8/arm64/
file date: 2025 Oct 12
file size: 549257216
fails with error that bsd kernel cannot boot (something like unable to
read)
Fix#2: install78.img from pub/OpenBSD/snapshots/arm64
does boot, and can be used to install
May I ask - would it be possible to put some note in the release folder
pub/OpenBSD/7.8/arm64 to warn people of this?
Quirk#3: Weird: Getting past U-boot, to actually boot kernel
seems to require that the UART (serial console) be powered.
In all tests, Raspberry Pi 5 has network, USB keyboard, USB mouse, HDMI
to screen
Test1:
UART connected, and with call-up (cu) displaying serial output
HDMI connected
result: HDMI shows red splash screen, U-boot, then text serial console,
able to login
Test2:
UART connected, FT232R connected (USB powered), but cu not running on
other computer
HDMI connected
result: HDMI shows red splash screen, U-boot, then text serial console,
able to login
Test3:
UART connected, FT232R unplugged from USB port (no power to chip FT2323R)
HDMI connected
result: HDMI shows red splash screen, U-boot(submarine), but never boots
Is this known?
Is there some setting to change in the Raspberry Pi 5 boot settings?
Thank you
Hi,
has anyone was able to boot RPI5 without serial powered? I installed on another
ARM64 system I have serial cable and tried to boot RPI5 but it never pass that
submarine image on HDMI and I can't get network to work (I copied
hostname.cad0 to try to get network, no good. Tried also usb NIC).
matheus
------------
"We will call you Cygnus,
The God of balance you shall be."
Mostly my Pi5 boots fine via the u-boot. But sometimes it happens, that
u-boot is unable to boot OpenBSD. In this case I open an addidional serial
connection, which ends up at the u-boot prompt. There I simply enter
"boot" and then the systems botts up into OpenBSD.
Thats the reason my serial cable is still connected to a NetBSD Raspberry
and helps to start the system.
regards
Berni
