Gfilui

I'm currently running a Ubuntu 16.04 system with the following kernel:

4.13.0-37-generic #42~16.04.1-Ubuntu

Since y'terday my Ethernet on this machine is not showing up. The ifconfig output does not show my ethernet interface either, this was working until yesterday.

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:326 errors:0 dropped:0 overruns:0 frame:0
 TX packets:326 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:1000 
 RX bytes:27663 (27.6 KB) TX bytes:27663 (27.6 KB)

wlp1s0 Link encap:Ethernet HWaddr f4:06:69:d8:ae:d2 
 inet addr:10.10.1.16 Bcast:10.10.1.255 Mask:255.255.255.0
 inet6 addr: fe80::7b8e:4a37:85e5:ff06/64 Scope:Link
 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
 RX packets:91 errors:0 dropped:0 overruns:0 frame:0
 TX packets:180 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:1000 
 RX bytes:9540 (9.5 KB) TX bytes:26108 (26.1 KB)

The lscpci does not show the Ethernet controller either

00:00.0 Host bridge: Intel Corporation Device 5904 (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Device 5916 (rev 02)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port (rev f1)
00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port (rev f1)
00:1f.0 ISA bridge: Intel Corporation Device 9d58 (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Device 9d71 (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
01:00.0 Network controller: Intel Corporation Wireless 3160 (rev 83)

The Ethernet controller is from Realtek RTL8111/8168/8411 PCI Express

If anyone can faced a similar issue on Ubuntu, please let me know on how you were able to resolve this.thanks!

As per the logs the problem seems to start from :

May 23 09:24:27 kernel: [227773.526020] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:25:30 kernel: [227836.525758] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:26:27 kernel: [227893.525154] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:28:27 kernel: [228013.524415] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:28:30 kernel: [228016.524332] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:30:27 kernel: [228133.523508] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:31:30 kernel: [228196.522981] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:32:27 kernel: [228253.522863] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:34:27 kernel: [228373.521750] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:34:30 kernel: [228376.521741] r8169 0000:02:00.0 enp2s0: rtl_counters_cond == 1 (loop: 1000, delay: 10).
May 23 09:34:57 kernel: [228404.405779] NETDEV WATCHDOG: enp2s0 (r8169): transmit queue 0 timed out