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[arbuntu <1164497@xxxxxxxxxxxxxxxxxx>]

Hopefully that enough information now for you to debug this issue.
FYI see also https://bugzilla.kernel.org/show_bug.cgi?id=56631
Thank you

** Changed in: linux (Ubuntu)
       Status: Expired => Confirmed

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https://bugs.launchpad.net/bugs/1164497

Title:
  108e:abcd niu 10g ethernet driver lock-up (Transmit timed out,
  resetting) and NETDEV WATCHDOG

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Using niu driver for this card:
  "Oracle/SUN Multithreaded 10-Gigabit Ethernet Network Controller" (PCI id = 108e:abcd)
  after a period (often less than 24 hours) the interface will hang, with errors every 5 seconds
  "niu: xxx: eth2: Transmit timed out, resetting"

  Sometimes also in syslog are messages
  WARNING: at sch_generic:255 dev_watchdog
  NETDEV WATCHDOG: eth2 (niu): transmit queue 10 timed out

  I've seen this in kernel 3.5.0-26-generic #42~precise1-Ubuntu SMP installed from 12.04 server.
  I've also seen it in kernel 3.2.0-39-generic #62-Ubuntu SMP after I installed this older version as a test.
  (I've not *yet* seen it in kernel 3.2.0-38-generic #61-Ubuntu SMP which is running on a different computer, same hardware but installed from 12.04 then upgraded rather than being installed from 12.04.2 directly. The problem computer is also less heavily loaded in general than the one which has worked fine so far.)
  --- 
  AlsaDevices:
   total 0
   crw-rw---T 1 root audio 116,  1 Dec  8 04:50 seq
   crw-rw---T 1 root audio 116, 33 Dec  8 04:50 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=5c24e548-cf18-4644-8f93-49c6e74b52a0
  InstallationMedia: Ubuntu-Server 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130214)
  MachineType: SUN MICROSYSTEMS SUN FIRE X2250
  MarkForUpload: True
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-41-generic root=UUID=eeb10158-22d5-486b-bb2e-8745655a4a59 ro consoleblank=0 enable_mtrr_cleanup mtrr_gran_size=1M mtrr_chunk_size=256M
  ProcVersionSignature: Ubuntu 3.5.0-41.64~precise1-generic 3.5.7.21
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-41-generic N/A
   linux-backports-modules-3.5.0-41-generic  N/A
   linux-firmware                            1.79.7
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  precise
  Uname: Linux 3.5.0-41-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: sysadmin vboxuser
  dmi.bios.date: 03/01/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: S86_3A19
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: SUN FIRE X2250
  dmi.board.vendor: SUN MICROSYSTEMS
  dmi.board.version: 50
  dmi.chassis.type: 23
  dmi.chassis.vendor: SUN MICROSYSTEMS
  dmi.chassis.version: 50
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrS86_3A19:bd03/01/2010:svnSUNMICROSYSTEMS:pnSUNFIREX2250:pvr50:rvnSUNMICROSYSTEMS:rnSUNFIREX2250:rvr50:cvnSUNMICROSYSTEMS:ct23:cvr50:
  dmi.product.name: SUN FIRE X2250
  dmi.product.version: 50
  dmi.sys.vendor: SUN MICROSYSTEMS

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