3 Replies Latest reply on Oct 17, 2010 1:38 AM by AndyCat

    Disappearing Ethernet NIC on D510MO


      A word of warning. I've encountered situations where the onboard LAN disappears and remains inaccessible from PCI. It remains inaccessible even after front panel RESET, and front panel POWER OFF/ON.


      Once the LAN has disappeared, the BIOS is unable to find it (Boot from LAN is not available as an option via F12, etc) and lspci does not show the NIC.


      The only way to recover is to pull the power cord, and allow the power to drain from the motherboard (green LED extinguishes). Apparently standby-power is sufficient to keep the chipset in this failed state.


      I've encountered this behaviour while transferring my Fedora Core 7 system over to the D510MO. I was using an FC7 rescue image on a USB stick. The problem might be triggered by:


      • HW probing by the rescue image
      • Booting from the USB stick itself
      • Use of the r8169 drive
        • 1. Re: Disappearing Ethernet NIC on D510MO

          confirmed that this is still an issue with the most recent BIOS, i reproduced it today.  using this motherboard in a NAS box.  both SATA ports filled + 4 more in a promise PCI card, USB keyboard, booted from a USB memory stick into a FreeBSD install several times, could format drives and install the OS fine, but never got a NIC detection.


          pciconf showed nothing resembling a network card.


          pulled the power plug for 20 seconds and fired the machine back up without the USB key attached, and the previously installed OS then picked up the NIC just fine, and it stays after reboot.


          i upgraded to the most recent BIOS before running across this post, that made no difference, the problem persisted until the power was pulled.

          • 2. Re: Disappearing Ethernet NIC on D510MO

            I, too, just experienced this problem. I run Slackware Linux 13.1 on my D510MO machine and, out of the blue, no network access. ifconfig, lspci and dmesg revealed that it wasn't seeing the NIC. After trying power-cycling, my reaction was that the board had failed, but fortunately, I found this thread and pulled the plug, which restored order. This problem needs to be reported to Intel (assuming discussing it in this group isn't sufficient) if it hasn't already. I'll look into it.


            Thanks again for providing the workaround that got my machine up and talking to the network again.


            /Don Allen

            • 3. Re: Disappearing Ethernet NIC on D510MO

              You must use r8168 driver not r8169!