> Date: Thu, 25 Sep 2025 08:50:30 +0200
> From: Bernhard Ernst <[email protected]>
> 
> On Wed, 24 Sep 2025 08:21:25 -0400
> "Brandon Mercer" <[email protected]> wrote:
> 
> > On Wed, Sep 24, 2025, at 6:03 AM, Bernhard Ernst wrote:
> > > Am Wed, 24 Sep 2025 09:30:56 +0100
> > > schrieb Stuart Henderson <[email protected]>:
> > >  
> > >> On 2025/09/23 22:22, Bernhard Ernst wrote:  
> > >> > Thanks for clarification, Mark.
> > >> > But even my installation via serial fails.    
> > >> 
> > >> Is that via a standard ttl serial adapter? I believe that at this
> > >> point, specifically the debug probe that Mark mentioned is
> > >> required, connected to the 3-pin header. AFAIK the GPIO pins as
> > >> used on earlier Pi machines will not work here.
> > >>   
> > >> > Better I wait for the OBSD 7.8-stable.    
> > >> 
> > >> We are currently in the wind-down towards 7.8 so unless changed
> > >> soon, this will be how things look for 7.8.
> > >>   
> > >
> > > Firstly I used a standard ttl serial adaptor (which was very very
> > > often used for installation of OBSD on RaspberryPi 4B and BananaPi
> > > M5). But 3 days ago I bought the debug probe, and had the same
> > > result: nothing comes over the serial. It makes me crazy to read
> > > here that some other guys successfully installed OBSD, but not me.  
> > 
> > Hello Bernhard,
> > I've recently built several headers to connect to my pi5's and I've
> > ended up with a few that did not work. I'm using a usb -> ttl with a
> > cable with 3 pins. I believe this is what you mean by debug probe. If
> > you're not seeing anything in the console there are a couple things
> > to look at: console speed, and the boot config to make sure the uart
> > is enabled. Past that, you should see uboot come up if the console is
> > working. If you are getting past that then we have different issues.
> > Please test the continuity of the rx and tx side independently
> > because I've had 2 cables now that the rx works, but tx has an open. 
> > 
> > Hopefully this helps. It does sound like you've done things correctly
> > though. Brandon
> > 
> 
> Thanks Brandon, very important hints!!! 
> According to this I cleaned up my workbench yesterday, took another Pi5
> (the third one), wrote a new miniroot78.img onto a totally new sd card
> and brewed a big pot of coffee.
> Then I started again, at first with an EDK firmware sd, because with
> that the Pi always booted.
> 1. Boot via EDK, select the image sd at usb,entered "set tty fb0" and
> OBSD boots up into HDMI to the installation menu. There system hangs,
> no keyboard, finito.
> 2. The same without "set tty fb0", debug probe is connected to another
> OBSD machine - and I got the boot output to the serial, as above up to
> the installation menu. There the system hangs, no keyboard.
> 
> So using EDK firmware seems to be not the best way.
> 
> 3. Now the newly written image sd into the mmc slot, a new nvme ssd into
> the HAT. No "set tty fb0" because now I knew that the serial works. Had
> wonderfull output into the serial, system booted and I was able to do a
> complete installation on the nvme ssd.
> Unfortunately the system on the nvme did not boot but hangs with the
> u-boot logo on the screen.
> Finally I prepared a special installation on a 64GB sc card via a Pi4.
> The installation was minimal with a big / and very small /usr/local and
> /home.
> This sd card booted perfectly and I now could create new partitions for
> /usr/local and /home on the nvme ssd.

Yes, this is another limitation from the lack of PCIe and RP1 support
in the current U-Boot.  I am working on some patches to fix this, but
I'm not sure those will land in the OpenBSD U-Boot port befor 7.8 is
released.

> So I now have a running system, till now without problems. Today I will
> make some tests and will then build another Pi5 system, running as a
> camera server with motion and mpv.
> 
> Thanks to this wonderfull mailing list and the great help. Without this
> assistance I probably had given up.
> 
> Regards
> Berni
>  
> 
> 

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