Re: 15-STABLE: dhclient fails on em0 (Lenovo T580)

It might be a typo in your mail, but it might also be the cause of your issue.
This config needs to be in /etc/rc.conf, not in /etc/src.conf as you state in your mail.

Regards,
Ronald.

 
Van: FreeBSD User <freebsd@walstatt-de.de>
Datum: vrijdag, 28 november 2025 08:26
Aan: FreeBSD CURRENT <freebsd-current@freebsd.org>
Onderwerp: 15-STABLE: dhclient fails on em0 (Lenovo T580)
> 
> I recently switched from FreeBSD 14-STABLE to 15-STABLE (after branching of 16-CURRENT)
> on my working laptop, physically a Lenovo T580. Its LAN NIC FreeBSD recognizes as em0
> (see below). System is at: 15.0-STABLE #16 stable/15-n281349-b903f27e171b: Fri Nov 28
> 05:20:32 CET 2025 amd64. Kernel config: GENERIC.
> Configuration has been setup and renewed acording to changes, consider the system as a
> fresh install.
> 
> Problem: em0 never gets an IPv4 via DHCP on startup (init process via rc.conf).
> 
> Configured in /etc/src.conf:
> [... WORKAROUND ...]
> netwait_enable="NO"
> netwait_if="em0"
> [...]
> 
> and on a regular basis:
> [...]
> ifconfig_em0="DHCP"
> ifconfig_em0_ipv6="inet6 accept_rtadv -ifdisabled nud -no_radr auto_linklocal"
> [...]
> 
> Very strange: after a final boot up, its very easy to require and achive an IPv4 with
> 
> dhclient em0
> 
> I'm out of ideas ...
> 
> 
> 
> 
> 
> ====
> pciconf:
> [...]
> em0@pci0:0:31:6:        class=0x020000 rev=0x21 hdr=0x00 vendor=0x8086 device=0x15d8
> subvendor=0x17aa subdevice=0x225a vendor     = 'Intel Corporation'
>     device     = 'Ethernet Connection (4) I219-V'
>     class      = network
>     subclass   = ethernet
>     bar   [10] = type Memory, range 32, base 0xe8200000, size 131072, enabled
>     cap 01[c8] = powerspec 3  supports D0 D3  current D0
>     cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
>     cap 13[e0] = PCI Advanced Features: FLR TP
> 
> [...]
> 
> dmesg:
> ichsmb0: <Intel Sunrise Point-LP SMBus controller> port 0xefa0-0xefbf mem
> 0xe8253000-0xe82530ff at device 31.4 on pci0 em0: <Intel(R) I219-V SPT(4)> mem
> 0xe8200000-0xe821ffff at device 31.6 on pci0 em0: EEPROM V0.1-3
> em0: Using 1024 TX descriptors and 1024 RX descriptors
> em0: Using an MSI interrupt
> em0: Ethernet address: 48:2a:e3:3a:cf:52
> em0: netmap queues/slots: TX 1/1024, RX 1/1024
> 
>  
> 
> 
>