networking - Ethernet Network (eth0) not working after upgrade to 16.04 - Ask Ubuntu


after upgrading dual-boot windows 10 , ubuntu 14.04 lts 16.04 wired connection has stopped working. option ethernet network greyed out , wireless connections available. ethernet connection not working in windows 10. running diagnostic in windows shows no ethernet cable connected. have tried same lan cable , setup on laptop , works.

my setup lan cable netgear powerline extender connected virgin media netgear superhub. works laptop.

the command cat /etc/network/interfaces shows up:

# interfaces(5) file used ifup(8) , ifdown(8) auto lo iface lo inet loopback

ip link shows:

1: lo: <loopback,up,lower_up> mtu 65536 qdisc noqueue state unknown mode default group default qlen 1     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 group default qlen 1000     link/ether f8:0f:41:d7:6e:4c brd ff:ff:ff:ff:ff:ff 3: wlan0: <broadcast,multicast,up,lower_up> mtu 1500 qdisc mq state mode dormant group default qlen 1000     link/ether 30:10:b3:58:9e:a0 brd ff:ff:ff:ff:ff:ff

ifconfig -a shows:

eth0      link encap:ethernet  hwaddr f8:0f:41:d7:6e:4c             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)  lo        link encap:local loopback             inet addr:127.0.0.1  mask:255.0.0.0           inet6 addr: ::1/128 scope:host           loopback running  mtu:65536  metric:1           rx packets:2505 errors:0 dropped:0 overruns:0 frame:0           tx packets:2505 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1            rx bytes:249314 (249.3 kb)  tx bytes:249314 (249.3 kb)  wlan0     link encap:ethernet  hwaddr 30:10:b3:58:9e:a0             inet addr:192.168.0.13  bcast:192.168.0.255  mask:255.255.255.0           inet6 addr: fe80::3210:b3ff:fe58:9ea0/64 scope:link           broadcast running multicast  mtu:1500  metric:1           rx packets:256489 errors:0 dropped:0 overruns:0 frame:0           tx packets:257071 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            rx bytes:259396146 (259.3 mb)  tx bytes:30064247 (30.0 mb)

dmesg | grep eth0 shows:

[    1.883397] r8169 0000:02:00.0 eth0: rtl8168g/8111g @ 0xffffc9000064a000, f8:0f:41:d7:6e:4c, xid 0c000800 irq 35 [    1.883404] r8169 0000:02:00.0 eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko] [  103.024707] ipv6: addrconf(netdev_up): eth0: link not ready [  104.161199] r8169 0000:02:00.0 eth0: rtl_phy_reset_cond == 1 (loop: 100, delay: 1). [  104.163807] r8169 0000:02:00.0 eth0: link down [  104.163900] ipv6: addrconf(netdev_up): eth0: link not ready

lspci -v shows ethernet controller:

02:00.0 ethernet controller: realtek semiconductor co., ltd. rtl8111/8168/8411 pci express gigabit ethernet controller (rev 0c)     devicename: onboard realtek lan     subsystem: acer incorporated [ali] rtl8111/8168/8411 pci express gigabit ethernet controller     flags: bus master, fast devsel, latency 0, irq 35     i/o ports @ e000 [size=256]     memory @ fe800000 (64-bit, non-prefetchable) [size=4k]     memory @ d0800000 (64-bit, prefetchable) [size=16k]     capabilities: [40] power management version 3     capabilities: [50] msi: enable+ count=1/1 maskable- 64bit+     capabilities: [70] express endpoint, msi 01     capabilities: [b0] msi-x: enable- count=4 masked-     capabilities: [d0] vital product data     capabilities: [100] advanced error reporting     capabilities: [140] virtual channel     capabilities: [160] device serial number 01-00-00-00-68-4c-e0-00     capabilities: [170] latency tolerance reporting     kernel driver in use: r8169     kernel modules: r8169

i upgraded network card driver using sudo apt-get install r8168-dkms didn't solve problem.


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