A slightly longer session:
$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode
DEFAULT
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state
DOWN mode DEFAULT qlen 1000
link/ether 5c:26:0a:7a:26:34 brd ff:ff:ff:ff:ff:ff
3: eth1: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state DORMANT mode DORMANT qlen 1000
link/ether d0:df:9a:d8:2b:46 brd ff:ff:ff:ff:ff:ff
$ ip addr eth0
Command "eth0" is unknown, try "ip addr help".
$ sudo mii-tool
[sudo] password for stephen:
SIOCGMIIPHY on 'eth1' failed: Operation not supported
no MII interfaces found
$ sudo mii-tool -p eth0
SIOCGMIIPHY on 'eth1' failed: Operation not supported
no MII interfaces found
$ dmesg | grep wl
[ 4.429047] wl: module license 'MIXED/Proprietary' taints kernel.
[ 4.464325] INFO @wl_cfg80211_attach : Registered CFG80211 phy
$ dmesg | grep eth
[ 0.169331] reboot: PCI series board detected. Selecting Dell Latitude
E6520-method for reboots.
[ 1.238195] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1)
5c:26:0a:7a:26:34
[ 1.238199] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
[ 1.238256] e1000e 0000:00:19.0 eth0: MAC: 10, PHY: 11, PBA No: 4041FF-0FF
[ 4.084864] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 4.550907] eth1: Broadcom BCM4727 802.11 Hybrid Wireless Controller
6.20.155.1 (r326264)
[ 5.874878] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 5.875343] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
$ service networking restart
stop: Rejected send message, 1 matched rules; type="method_call",
sender=":1.47" (uid=1000 pid=2853 comm="stop networking ")
interface="com.ubuntu.Upstart0_6.Job" member="Stop" error name="(unset)"
requested_reply="0" destination="com.ubuntu.Upstart" (uid=0 pid=1
comm="/sbin/init")
start: Rejected send message, 1 matched rules; type="method_call",
sender=":1.48" (uid=1000 pid=2850 comm="start networking ")
interface="com.ubuntu.Upstart0_6.Job" member="Start" error name="(unset)"
requested_reply="0" destination="com.ubuntu.Upstart" (uid=0 pid=1
comm="/sbin/init")
$ sudo service networking restart
networking stop/waiting
networking start/running
$ sudo mii-tool
SIOCGMIIREG on eth0 failed: Input/output error
SIOCGMIIREG on eth0 failed: Input/output error
eth0: negotiated 100baseTx-FD flow-control, link ok
SIOCGMIIPHY on 'eth1' failed: Operation not supported
$ ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 5c:26:0a:7a:26:34 brd ff:ff:ff:ff:ff:ff
$ sudo dhclient -v eth0
Internet Systems Consortium DHCP Client 4.2.4
Copyright 2004-2012 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/eth0/5c:26:0a:7a:26:34
Sending on LPF/eth0/5c:26:0a:7a:26:34
Sending on Socket/fallback
DHCPREQUEST of 192.168.1.3 on eth0 to 255.255.255.255 port 67 (xid=0x11a90ba0)
DHCPREQUEST of 192.168.1.3 on eth0 to 255.255.255.255 port 67 (xid=0x11a90ba0)
DHCPREQUEST of 192.168.1.3 on eth0 to 255.255.255.255 port 67 (xid=0x11a90ba0)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0x114990e3)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6 (xid=0x114990e3)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11 (xid=0x114990e3)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 17 (xid=0x114990e3)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 (xid=0x114990e3)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 15 (xid=0x114990e3)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 15 (xid=0x114990e3)
^C
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https://bugs.launchpad.net/bugs/1161655
Title:
Wired and wireless networking don't work after upgrade
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