ethernet disconnected, shows up in ifconfig
I am running 11.04, no remix. After installation, I could use wireless networks, but not ethernet. When I click on the connections menu item, it says
Wired Network
disconnectedHow do I fix this?
Here is the ethernet portion of ifconfig:
eth0 Link encap:Ethernet HWaddr 00:16:36:86:f3:43 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:17And the result of lspci:
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01)
00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5788 Gigabit Ethernet (rev 03)
02:09.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
02:09.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller
02:09.4 Communication controller: Texas Instruments PCIxx12 GemCore based SmartCard controller
08:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] NetMy /etc/network/interfaces looks like this:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcpAnd I get no output from sudo ifconfig eth0 up.
Output from nm-applet:
** (nm-applet:1824): DEBUG: old state indicates that this was not a disconnect 0
** (nm-applet:1824): DEBUG: old state indicates that this was not a disconnect 0On second run of nm-applet:
** (nm-applet:2752): DEBUG: old state indicates that this was not a disconnect 0
** (nm-applet:2752): DEBUG: old state indicates that this was not a disconnect 0
** (nm-applet:2752): WARNING **: _nm_object_get_property: Error getting 'WpaFlags' for /org/freedesktop/NetworkManager/AccessPoint/10: (19) Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties" doesn't exist
** (nm-applet:2752): WARNING **: _nm_object_get_property: Error getting 'RsnFlags' for /org/freedesktop/NetworkManager/AccessPoint/10: (19) Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties" doesn't exist
** (nm-applet:2752): WARNING **: Error in getting active connection 'Vpn' property: (19) Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties" doesn't exist
** (nm-applet:2752): WARNING **: _nm_object_array_demarshal: couldn't create object for /org/freedesktop/NetworkManager/ActiveConnection/0
** Message: <info> No keyring secrets found for Auto HeyJude88/802-11-wireless-security; asking user.
** (nm-applet:2752): WARNING **: applet.c.2882 (applet_settings_new_secrets_requested_cb): couldn't find details for connection
** Message: <info> No keyring secrets found for Auto HeyJude88/802-11-wireless-security; asking user.
** (nm-applet:2752): DEBUG: going for offline with icon: notification-network-wireless-disconnected
** (nm-applet:2752): DEBUG: foo_client_state_changed_cb
** (nm-applet:2752): DEBUG: foo_client_state_changed_cb
** (nm-applet:2752): DEBUG: foo_client_state_changed_cb
** (nm-applet:2752): DEBUG: going for offline with icon: notification-network-wireless-disconnected
** (nm-applet:2752): DEBUG: foo_client_state_changed_cbHere's more to ifconfig:
wlan0 Link encap:Ethernet HWaddr 00:18:de:31:70:20 inet addr:172.16.6.210 Bcast:172.16.6.255 Mask:255.255.255.0 inet6 addr: fe80::218:deff:fe31:7020/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2384 errors:0 dropped:0 overruns:0 frame:0 TX packets:1367 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:514654 (514.6 KB) TX bytes:215138 (215.1 KB)3 Answers
Edit the interfaces file to remove
auto eth0
iface eth0 inet dhcpSave and restart. Use Network manager to edit the connection and set it to automatically connect.
This command will open the interfaces file in Gedit with permission to save the file:
sudo gedit /etc/network/interfacesI have both a wired and a wireless connection and all that is in my interfaces file is these two lines
auto lo
iface lo inet loopbackI have found from experience than anything else will prevent a connection and removing what is extra will solve the problem.
1Basic layer 1 ground check - is your ethernet port connected and are you sure the wire and modem port are fine? Please confirm that the ethernet port light blinks (either green or amber) when you connect the wire. Otherwise it is a physical layer issue. Does it work on other machines at the same swtich-port?
Assuming the above is taken care of, Have you tried
sudo ifconfig eth0 up?Also, check your
/etc/network/interfacesfile and see if the following line is thereauto eth0
This automatically enables eth0 on startup
If you perform the same first command I mentioned in my comment
killall -9 nm-appletThen
sudo service network-manager stopwhich will stop the network manager service then enter this command
sudo rm /var/lib/NetworkManager/NetworkManager.stateWhich will remove the NetworkManager.state file don't worry this file will be regenerated the restart the network manager service with this command
sudo service network-manager stopand finally restart nm-applet with this command
nohup nm-applet &It should hopefull be able to connect now.
The reason this happens is that the last time the network was disconected was because of a crash. Because the crash may be related to the network connection it is temporarily disabled to allow you to boot back in and fix the problem before re-enabling the connection.
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