I think this may be a hardware issue. Nano is pretty new, 1-2 weeks old, so probably easiest to just exchange on amazon, just want to make sure i’m not missing anything. Has been working fine up until now. It’s on a private network. I woke up this morning and couldn’t ssh into it. It’s headless.
I tried to power cycle it a couple times, then plugged in a usb cable to my laptop and got it up on serial console. It sees the ethernet card, but no link detected, nor link light. I tried a different switch port, a different cable and verified with my laptop that the cable and switch port are fine.
I’m not sure if the link led ever worked, but i’m not seeing link on the switch either.
any other troubleshooting steps? I should see? see output of lspci, dmesg, and ethtool below.
$sudo lspci -v 00:02.0 PCI bridge: NVIDIA Corporation Device 0faf (rev a1) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0, IRQ 84 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 I/O behind bridge: 00001000-00001fff Memory behind bridge: 13000000-130fffff Capabilities:  Subsystem: NVIDIA Corporation Device 0000 Capabilities:  Power Management version 3 Capabilities:  MSI: Enable- Count=1/2 Maskable- 64bit+ Capabilities:  HyperTransport: MSI Mapping Enable- Fixed- Capabilities:  Express Root Port (Slot+), MSI 00 Capabilities:  Advanced Error Reporting Capabilities:  L1 PM Substates Kernel driver in use: pcieport 01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15) Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller Flags: bus master, fast devsel, latency 0, IRQ 406 I/O ports at 1000 [size=256] Memory at 13004000 (64-bit, non-prefetchable) [size=4K] Memory at 13000000 (64-bit, non-prefetchable) [size=16K] Capabilities:  Power Management version 3 Capabilities:  MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities:  Express Endpoint, MSI 01 Capabilities: [b0] MSI-X: Enable- Count=4 Masked- Capabilities: [d0] Vital Product Data Capabilities:  Advanced Error Reporting Capabilities:  Virtual Channel Capabilities:  Device Serial Number 00-00-00-00-00-00-00-00 Capabilities:  Latency Tolerance Reporting Capabilities:  L1 PM Substates Kernel driver in use: r8168 $ dmesg |grep -i eth [ 0.000000] psci: probing for conduit method from DT. [ 4.354485] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.4.0-k [ 4.399949] r8168 Gigabit Ethernet driver 8.045.08-NAPI loaded [ 4.420365] r8168 0000:01:00.0 (unnamed net_device) (uninitialized): Invalid ethernet address 00:00:00:00:00:00, trying device tree node [ 4.432749] r8168 0000:01:00.0 (unnamed net_device) (uninitialized): Found valid ethernet address 00:04:4b:ea:bc:b2 from device tree [ 4.528756] usbcore: registered new interface driver cdc_ether [ 8.902922] using random self ethernet address [ 8.907399] using random host ethernet address [ 10.008655] using random self ethernet address [ 10.016799] using random host ethernet address [ 11.377086] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 11.378217] eth0: 0xffffff800a36e000, 00:04:4b:ea:bc:b2, IRQ 406 [ 11.439113] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 17.587538] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 $ sudo ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: internal Auto-negotiation: on MDI-X: Unknown Supports Wake-on: pumbg Wake-on: g Current message level: 0x00000033 (51) drv probe ifdown ifup Link detected: no