Most recent kernel where this bug did not occur: Don't know. Only began checking
on 2.6.17, and it didn't work there.

Distribution: Linux from Scratch

Hardware Environment: PIII 500.

$ lspci
00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge
(rev 03)
00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge
(rev 03)
00:07.0 ISA bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 02)
00:0c.0 Multimedia audio controller: Yamaha Corporation YMF-724F [DS-1 Audio
Controller] (rev 03)
00:0e.0 USB Controller: NEC Corporation USB (rev 43)
00:0e.1 USB Controller: NEC Corporation USB (rev 43)
00:0e.2 USB Controller: NEC Corporation USB 2.0 (rev 04)
00:0f.0 Ethernet controller: D-Link System Inc DL10050 Sundance Ethernet (rev 12)
00:10.0 Serial controller: 3Com Corp, Modem Division 56K FaxModem Model 5610
(rev 01)
01:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200 PRO]
(rev 01)
01:00.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200 PRO]
(Secondary) (rev 01)

Software Environment:

Linux silky 2.6.18.1-1 #1 PREEMPT Wed Oct 18 18:04:39 PDT 2006 i686 pentium3
i386 GNU/Linux

Gnu C                  4.0.3
Gnu make               3.80
binutils               2.16.1
util-linux             2.12r
mount                  2.12r
module-init-tools      3.2.2
e2fsprogs              1.38
Linux C Library        2.3.6
Dynamic linker (ldd)   2.3.6
Linux C++ Library      6.0.7
Procps                 3.2.6
Net-tools              1.60
Kbd                    1.12
Sh-utils               5.94
udev                   096
Modules Loaded         radeon drm ipv6 ipt_REJECT xt_tcpudp iptable_nat ip_nat
ipt_LOG xt_state ip_conntrack_ftp ip_conntrack nfnetlink iptable_filter
ip_tables x_tables binfmt_misc nls_iso8859_1 nls_cp437 vfat fat joydev usbhid
usblp snd_ymfpci gameport snd_ac97_codec snd_ac97_bus snd_pcm_oss snd_mixer_oss
snd_pcm snd_opl3_lib snd_timer snd_hwdep snd_page_alloc snd_mpu401_uart
snd_rawmidi snd_seq_device evdev snd sundance intel_agp soundcore agpgart
ehci_hcd mii uhci_hcd ohci_hcd dm_crypt dm_mod fuse

Problem Description:

Using the D-Link 550-TX with the sundance driver fails to change the carrier
status when plugging/unplugging network cable. Some userspace stats:

# cat /sys/class/net/eth0/carrier
1
# ip link show eth0
2: eth0: <BROADCAST,MULTICAST,NOTRAILERS,UP,10000> mtu 1500 qdisc pfifo_fast
qlen 1000
    link/ether 00:05:5d:e5:ae:08 brd ff:ff:ff:ff:ff:ff
# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:05:5D:E5:AE:08
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:608 (608.0 b)  TX bytes:7777 (7.5 Kb)
          Interrupt:10 Base address:0x1000
# grep . /sys/class/net/eth0/*
/sys/class/net/eth0/address:00:05:5d:e5:ae:08
/sys/class/net/eth0/addr_len:6
/sys/class/net/eth0/broadcast:ff:ff:ff:ff:ff:ff
/sys/class/net/eth0/carrier:1
/sys/class/net/eth0/dormant:0
/sys/class/net/eth0/features:0x0
/sys/class/net/eth0/flags:0x1023
/sys/class/net/eth0/ifindex:2
/sys/class/net/eth0/iflink:2
/sys/class/net/eth0/link_mode:0
/sys/class/net/eth0/mtu:1500
/sys/class/net/eth0/operstate:unknown
/sys/class/net/eth0/tx_queue_len:1000
/sys/class/net/eth0/type:1
grep: /sys/class/net/eth0/uevent: Permission denied
/sys/class/net/eth0/weight:0

These are all exactly the same when the cable is unplugged.

Steps to reproduce:

Bring up network interface, unplug cable. Carrier status doesn't change.