Incorrect link status for wm0 network interface?

[Jarle Greipsland <jarle%uninett.no@localhost>]

Hi,

I have just booted a -current i386 GENERIC kernel on my Lenovo
T400s laptop (userland is of 7.99.32 vintage).  There seems to be
something strange going on with regards to the carrier status for
the built in wm0 network interface.  When left unconfigured, it
reports 'active' as its status.  As soon as I bring the interface
up with ifconfig, the status changes to 'no carrier'.  However,
the interface acquires an IPv6 address through SLAAC, so
something is working.  But the

  'dhcpcd -6 --nodhcp6 wm0'

command that would normally solicit a default route from the
network hangs waiting for carrier on the interface.  If I enter
a static default route, things behave as normal.

# ifconfig wm0
wm0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        capabilities=7ff80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx>
        capabilities=7ff80<TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx,TCP6CSUM_Rx>
        capabilities=7ff80<TCP6CSUM_Tx,UDP6CSUM_Rx,UDP6CSUM_Tx,TSO6>
        enabled=0
        ec_capabilities=7<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU>
        ec_enabled=0
        address: 00:11:22:33:44:55
        media: Ethernet autoselect (none)
        status: no carrier
        inet6 fe80::0211:22ff:fe33:4455%wm0 prefixlen 64 detached scopeid 0x2
        inet6 xxxx::0211:22ff:fe33:4455 prefixlen 64 autoconf

(Unfortunately, I cannot get a dmesg dump from the current system.  dmesg
complains 'dmesg: can't get msgbuf: Device not configured'.)
The wm0 part of the dmesg from the 7.99.32 incarnation of the
systems shows

wm0 at pci0 dev 25 function 0: 82801I mobile (AMT) LAN Controller (rev. 0x03)
wm0: interrupting at msi0 vec 0
wm0: PCI-Express bus
wm0: 2048 words FLASH
wm0: Ethernet address 00:11:22:33:44:55
makphy0 at wm0 phy 2: Marvell 88E1149 Gigabit PHY, rev. 1
makphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto

Any guesses as to what might be wrong?

					-jarle