Re: Not detecting link up on ethernet

[Joe Barnett <thejoe gmail com>]

On 4/18/05, Joe Barnett <thejoe gmail com> wrote:
> Hi,
> 
> When I start Networkmanager, it correctly brings up my eth0 device.
> When I unplug the network cable, it correctly tries to connect my
> wlan0 device.  But for some reason, when I plug back in the network
> cable, NetworkManager never seems to get the device plugged in event.
> 
> I'm running Ubuntu hoary (2.6.10 kernel) on the following network hardware:
> 
> eth0:
> Ethernet controller: Broadcom Corporation NetXtreme BCM5751 Gigabit
> Ethernet PCI Express (rev 01) using the tg3 kernel driver included in
> 2.6.10 (plus whatever patches ubuntu may have made)
> 
> wlan0:
> Network controller: Broadcom Corporation BCM4306 802.11b/g Wireless
> LAN Controller (rev 03) using ndiswrapper 1.2rc1
> 
> when I plug in the ethernet cable, the following appears in my syslog:
> Apr 18 10:58:19 localhost kernel: tg3: eth0: Link is up at 100 Mbps,
> half duplex.
> Apr 18 10:58:19 localhost kernel: tg3: eth0: Flow control is off for
> TX and off for RX.
> 
> ...but nothing from NM.
> 
> Thanks,
> -Joe
> 


this seems to be related to the other issue I reported on a while back
in march, where NM is seeing phantom bad packets on UDP that are not
on the correct ports.
(http://mail.gnome.org/archives/networkmanager-list/2005-March/msg00003.html)

if i unplug and replug the ethernet cable before the phantom UDP
packets, then it works fine.  also, pluging and unplugging the
ethernet cable occasianlly makes the UDP packets go away and the
connection succeed.

None of it makes any sense to me...
-Joe