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[thomas955 <thoehlig@xxxxxxxxxx>]

Hi,

additional i did a few "system" upgrades too. (may thats why its working
for me)

My system : dell poweredge R815
BIOS version 3.2.1
Firmware: 1.96 (Build 01)

uname -a
Linux hostname 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

now some ethtool infos:
ethtool -i 10gbiface
driver: ixgbe
version: 3.15.1-k
firmware-version: 0x546c0001
bus-info: 0000:22:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no

If you also have a dell try to upgrade the firmware. 
p.s. 
you can write me an email, i have some "helpfull" upgrade - links :-D

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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1245938

Title:
  Intel x520 NIC's (ixgbe) stop working in 12.10, 13.04, 13.10

Status in “linux” package in Ubuntu:
  Confirmed
Status in “linux” source package in Quantal:
  Confirmed
Status in “linux” source package in Raring:
  Confirmed
Status in “linux” source package in Saucy:
  Confirmed
Status in “linux” source package in Trusty:
  Confirmed

Bug description:
  We have a server (Dell R715) with two Intel x520 NIC's. If we run
  Ubuntu 12.04 on it, the NIC's works flawlessly (with stock kernel
  driver or with Intel compiled one), but if we upgrade release to
  12.10, 13.04 or 13.10, the NIC's stop working: either stock or Intel
  drivers fails with error:

  [  226.395766] Intel(R) 10 Gigabit PCI Express Network Driver - version 3.18.7
  [  226.395770] Copyright (c) 1999-2013 Intel Corporation.
  [  226.395980] ixgbe: probe of 0000:22:00.0 failed with error -5
  [  226.396092] ixgbe: probe of 0000:22:00.1 failed with error -5
  [  226.396203] ixgbe: probe of 0000:23:00.0 failed with error -5
  [  226.396311] ixgbe: probe of 0000:23:00.1 failed with error -5

  I contacted Intel developers and they responded:

  "Hey Fernando,
  We (ixgbe) only returns EIO (error 5) for a couple of reasons.
   1) When we fail to io map (ioremap)
   2) If the eeprom checksum is incorrect.
   3) If the MAC address from the checksum is invalid

  Reasons 2 and 3 are related to the NIC's eeprom so if they worked with another system they should still be fine now.  If you really wanted to verify you could try out the NIC's on a known good system again to see if the eeprom somehow got corrupted.
  That pretty much leaves us with ioremap returning an error.  I'm not at all sure why your Ubuntu release would not like the way we are calling ioremap, but it might give you a place to start looking in Ubuntu changes.
  Thanks,
  -Don"

  If the server boot with kernel 3.2.0-55 (from grub menu) both NIC's
  works fine.

  Please let me know how can I help!

  Regards

  Fernando

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