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Out of the blue my second ethernet port stopped working. Both of them are part of the motherboard.

I can see both of the ports in bios. They were working, but I was using only one of them up to now. /etc/network/interface is correctly setup and changed the settings between, eth0 and eth1.

sudo modprobe tg3 did not help either, (since in the documentation it sais this is the mod for the two Ethernet ports/cards.)

Is it a lost cause, has it gone bad or can it be fixed?

lshw -C network

*-network UNCLAIMED     
   description: Ethernet controller
   product: NetXtreme BCM5721 Gigabit Ethernet PCI Express
   vendor: Broadcom Corporation
   physical id: 0
   bus info: pci@0000:03:00.0
   version: 11
   width: 64 bits
   clock: 66MHz
   capabilities: bus_master vga_palette cap_list
   configuration: latency=0
   resources: iomemory:ffffffff0-fffffffef
*-network
   description: Ethernet interface
   product: NetXtreme BCM5721 Gigabit Ethernet PCI Express
   vendor: Broadcom Corporation
   physical id: 0
   bus info: pci@0000:04:00.0
   logical name: eth0
   version: 11
   serial: 00:1c:23:1c:af:8c
   size: 100Mbit/s
   capacity: 1Gbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.134 duplex=full firmware=5721-v3.61, ASFIPMI v6.21 ip=***.***.***.*** latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s

Note: I also tried a live Ubuntu 14.04 cd and I had the same problems.


lspci -v

 03:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet PCI Express (rev 11)
    Subsystem: Dell PowerEdge 860
    Flags: fast devsel, IRQ 16
    Capabilities: [48] Power Management version 2
    Capabilities: [50] Vital Product Data
    Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
    Capabilities: [d0] Express Endpoint, MSI 00


  04:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet PCI Express (rev 11)
    Subsystem: Dell PowerEdge 860
    Flags: bus master, fast devsel, latency 0, IRQ 17
    Memory at fe7f0000 (64-bit, non-prefetchable) [size=64K]
    Expansion ROM at <ignored> [disabled]
    Capabilities: [48] Power Management version 2
    Capabilities: [50] Vital Product Data
    Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
    Capabilities: [d0] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [13c] Virtual Channel
    Kernel driver in use: tg3
  • What driver is eth0 using? lspci -v. What does dmesg say about all this? – Ryan Babchishin Oct 11 '15 at 1:36
  • Kernel driver in use: tg3 – Stanislav Oct 11 '15 at 3:00
  • And does dmesg say anything when the system boots about eth0-1 or tg3? – Ryan Babchishin Oct 11 '15 at 16:10
  • There are a lot of messages for eth0, which look normal, no messages for eth1, and the only weird for tg3 was: tg3 0000:03:00.0: Cannot map device registers, aborting tg3: probe of 0000:03:00.0 failed with error -12 – Stanislav Oct 11 '15 at 21:46
  • Not good. Can you try a different operating system? FreeBSD, Windows, something? Just to see if the NIC will be detected. I'm guessing it's a hardware problem though. – Ryan Babchishin Oct 12 '15 at 3:53

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