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

On Sat, 3 Oct 2026, Bjoern A. Zeeb wrote:

> On Sat, 26 Sep 2026, Warner Losh wrote:
>
>> 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
>
> I could not yet do that.

The patch works and seems to make things boot again.

Thank you so much!


>> 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.
>
> I got another test machine I could at least boot once but that indeed does
> have multiple interfaces.
>
> It says:
>
> Setting currdev to md0:
> MD not present
> Setting currdev to net0:
> Portmapper returned 0. TCP-only NFS server?
> Portmapper returned 0. TCP-only NFS server?
>
> /bz
>
>

-- 
For there shall arise false Christs, and false prophets, and shall shew
great signs and wonders; insomuch that, if it were possible, they shall
deceive the very elect. Behold, I have told you before. [Mat. 24:24-25]