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So I installed a new motherboard with an existing Ubuntu install and now my network won't connect (wired).

The first help thread I read suggested deleting /etc/udev/70-persistent-net.rules and then rebooting, saying that this file would get recreated on startup. I tried this and rebooted several times but no replacement file is created.

Other recommendations include changing the eth0 string in /etc/udev/70-persistent-net.rules to the new eth, but they don't say where I can see what the new eth # is for the new motherboard.

ifconfig also shows no ethernet adapters available.

lo
Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK running MTU:65536 Metric:1
RX packets:1520 errors:0 dropped:0 overruns:0 frame:0
RX packets:1520 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:119430 (119.4KB) TX bytes:119430 (119.4 KB)

New motherboard is a Gigabyte Z170XP-SLI, if that matters.

As per this thread I've checked /var/log/syslog but have found no udev[nnn]: renamed network interface ethN to ethX lines.

dmidecode | grep -b3 -a3 -i "Eth" yields

14986-Handle 0x003B, DMI type 41, 11 bytes
15023-Onboard Device
15038-  Reference Designation:  Onboard LAN
15075:  Type: Ethernet
15091-  Status: Enabled
15108-  Type Instance: 1
15126-  Bus Address: 0000:00:19.0

and dmesg | grep -i "Eth" yields:

[    1.849863] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
11
  • I wonder if your system is loading a suitable network driver. Can you provide the output of sudo lspci ?
    – davidgo
    Feb 14, 2016 at 20:53
  • @davidgo In lspci I see an entry that reads: 00:1f.6 Ethernet controller: Intel Corporation Device 15b8 (rev 31) Feb 14, 2016 at 22:08
  • Try udevadm trigger. Feb 14, 2016 at 22:55
  • @MariusMatutiae That didn't give any output, didn't fail but didn't write anything to the console. Feb 14, 2016 at 23:07
  • And now does ip link show show anything apart from lo? Feb 14, 2016 at 23:25

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