On Sun, Sep 21, 2025 at 08:43:25AM +0000, Bernhard Ernst wrote: > > I know that it should work in this way, but I have no chance to enter > any character. The only output to HDMI is the nice little u-boot logo. > That's all. No OpenBSD boot prompt, absolutely nothing. > > Did you change or add anything in the config.txt?
I changed a few lines, trying to enable serial output on GPIOs 14/15 with no luck (although I suspect a code change could be needed in OpenBSD to get the secondary serial device to attach, since there are at least 2 more serial devices not configured in the dmesg I sent before). In any case, to get OpenBSD installed in the Pi 5, I didn't modify the config.txt provided by the install images. This is what I have in that file for now: arm_64bit=1 enable_uart=1 dtoverlay=uart0-pi5 dtparam=uart0=on dtoverlay=disable-bt kernel=u-boot.bin dtparam=uart0_console What I gather from the docs is: the primary console will always be available in the debug port (so, you need the debug probe cable or something compatible with that). Once you get the serial output working, let the Pi firmware boot and find u-boot, then in OpenBSD bootloader you can switch the console to fb0 or continue with serial. Once you install OpenBSD, you can also configure /etc/boot.conf to automate that and avoid using the debug probe.
