Re: loader_4th.efi "IPv4 PXE" net booting no longer works

On Sat, Sep 26, 2026 at 7:36 AM Bjoern A. Zeeb <
bzeeb-lists@lists.zabbadoz.net> wrote:

> On Sat, 26 Sep 2026, Warner Losh wrote:
>
> > On Sat, Sep 26, 2026 at 6:17 AM Bjoern A. Zeeb <
> > bzeeb-lists@lists.zabbadoz.net> wrote:
> >
> >> Hi,
> >>
> >> sorry I cannot gather more parts of the console before this easily; this
> >> is a remote machine booting via IPv4 (just in case you wonder with me).
> >>
> >> It's a EDK II firmware, boot options is IPv4 PXE.  Boot file is
> loader.efi,
> >> which is loader_4th.efi in that setup.
> >>
> >> I updated to a kernel/world from the last 48 hours and the boot hangs:
> ..
> >>
> >> Do I need to start a bisect?
> >>
> >
> > If you have multiple NICs, it may be that we assume unit 0 in the
> > committed code. I got a report yesterday thta I saw just before
> > I was heading to bed, so I worked up
> >
> > http://people.freebsd.org/~imp/net-unit.patch
> >
> > to see if it fixed the problem for the reporter and sent it off. I then
> > told claude to add a two-nic booting from the second nic scenario
> > to boot-test.sh and went to bed. Now I wake up to this :) I'll see
> > if that tests things, but in the mean time, it wouldn't hurt to try
> > the above.
>
> I'll give it a shot as soon as I can reboot again (may be a few hours
> still)
> but the machine in question here has a single NIC only.
>
> If it does not help I'll try to narrow things down and report back.
>

If my patch doesn't work, try commenting out the call
to maybe_download_initmd() in main.c

Finally, how long did you wait at the end? There's a 5 minute timeout that
might tell us something if it times out vs other behavior.

Warner