Lambda Quad: No ethernet after force reboot

post by rbkumar on May 25, 2020

Lost internet connection on the the Lambda Quad after a force reboot. Ethernet cable functioning (tested and working in my tensorbook):

Below are lspci, lshw, ethtool, journalctrl outputs.

BTW, Ethernet port on motherboard, no additional network cards.

Any suggestions?

Ravi

lspci -vmm | grep -B1 -A2 ‘^Class.*Ethernet’
returns nothing.

lshw -c network
returns
*-network:0
description: Ethernet interface
physical id: 2
logical name: enx00e04c0c0c72
serial: 00:e0:4c:0c:0c:72
size: 10Mbit/s
capacity: 1Gbit/s
capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8152 driverversion=v1.09.11 duplex=half link=no multicast=yes port=MII speed=10Mbit/s
*-network:1
description: Ethernet interface
physical id: 3
logical name: docker0
serial: 02:42:95:3f:e5:89
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A ip=172.17.0.1 link=no multicast=yes

journalctl -u NetworkManager
returns (clipped)
Jul 10 19:56:47 ravi-dl1 NetworkManager[1085]: [1562813807.8780] Loaded device plugin: NMWifiFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wifi.so)
Jul 10 19:56:47 ravi-dl1 NetworkManager[1085]: [1562813807.8788] device (lo): carrier: link connected
Jul 10 19:56:47 ravi-dl1 NetworkManager[1085]: [1562813807.8793] manager: (lo): new Generic device (/org/freedesktop/NetworkManager/Devices/1)
Jul 10 19:56:47 ravi-dl1 NetworkManager[1085]: [1562813807.8802] manager: (enp2s0f0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/2)
Jul 10 19:56:47 ravi-dl1 NetworkManager[1085]: [1562813807.8812] keyfile: add connection in-memory (8ff0efa1-520e-321b-8946-20caf69ac447,“Wired connection 1”)
Jul 10 19:56:47 ravi-dl1 NetworkManager[1085]: [1562813807.8815] settings: (enp2s0f0): created default wired connection ‘Wired connection 1’
Jul 10 19:56:47 ravi-dl1 NetworkManager[1085]: [1562813807.8822] device (enp2s0f0): state change: unmanaged → unavailable (reason ‘managed’, sys-iface-state: ‘external’)
Jul 10 19:56:48 ravi-dl1 NetworkManager[1085]: [1562813808.1500] manager: (enp2s0f1): new Ethernet device (/org/freedesktop/NetworkManager/Devices/3)
Jul 10 19:56:48 ravi-dl1 NetworkManager[1085]: [1562813808.1508] keyfile: add connection in-memory (0b1f3d1a-4c69-3bfe-b7f5-d35f08236ddd,“Wired connection 2”)
Jul 10 19:56:48 ravi-dl1 NetworkManager[1085]: [1562813808.1511] settings: (enp2s0f1): created default wired connection ‘Wired connection 2’
Jul 10 19:56:48 ravi-dl1 NetworkManager[1085]: [1562813808.1516] device (enp2s0f1): state change: unmanaged → unavailable (reason ‘managed’, sys-iface-state: ‘external’)
Jul 10 19:56:48 ravi-dl1 NetworkManager[1085]: [1562813808.4235] modem-manager: ModemManager available

ethtool enx00e04c0c0c72
returns
Settings for enx00e04c0c0c72:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Speed: 10Mb/s
Duplex: Half
Link detected: no

post by rbkumar on May 26, 2020

Just got off the phone with Gerome (Jerome?) @ Lambda Labs support.
He had me pop the cmos battery from the motherboard, powercycle for 30 secs and voila, the network cards are back to life!

Fantastic!
Thanks a bunch Gerome!

Here is the output showing the interfaces once again! enp2s0f0 / enp2s0f1

ifconfig

docker0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500  
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 172.17.255.255  
        ether 02:42:74:3e:82:1e  txqueuelen 0  (Ethernet)  
        RX packets 0  bytes 0 (0.0 B)  
        RX errors 0  dropped 0  overruns 0  frame 0  
        TX packets 0  bytes 0 (0.0 B)  
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp2s0f0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500  
        ether 0c:9d:92:1f:e2:d5  txqueuelen 1000  (Ethernet)  
        RX packets 0  bytes 0 (0.0 B)  
        RX errors 0  dropped 0  overruns 0  frame 0  
        TX packets 0  bytes 0 (0.0 B)  
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp2s0f1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500  
        inet 10.0.0.196  netmask 255.255.255.0  broadcast 10.0.0.255  
        ether 0c:9d:92:1f:e2:d6  txqueuelen 1000  (Ethernet)  
        RX packets 19088  bytes 19975514 (19.9 MB)  
        RX errors 0  dropped 0  overruns 0  frame 0  
        TX packets 12707  bytes 2505512 (2.5 MB)  
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536  
        inet 127.0.0.1  netmask 255.0.0.0  
        RX packets 1230  bytes 225942 (225.9 KB)  
        TX packets 1230  bytes 225942 (225.9 KB)