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[Matthias Muthmann <mmuthmann@xxxxxxx>]

I am also seeing disconnects with the atl1c under load.
There is a related kernel bug:
https://bugzilla.kernel.org/show_bug.cgi?id=54021

Problem should be fixed on lasted git:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/net/ethernet/atheros/atl1c?id=7b70176421993866e616f1cbc4d0dd4054f1bf78

Please consider applying this patch to your kernel, since lan is not
usable with this bug.

I am using kubuntu raring 64bit.

** Bug watch added: Linux Kernel Bug Tracker #54021
   http://bugzilla.kernel.org/show_bug.cgi?id=54021

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https://bugs.launchpad.net/bugs/1036668

Title:
  atl1c: network get stuck randomly under high load

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  since a few days I am using a FreeNAS server as home storage, and I
  noticed that often when I am trasferring large ISO via NFS, the
  network stop transmitting and receiving packets: I cannot ping any
  other host on the local network, and the system doesn't recognize even
  the unplugging of the ethernet cable (I tried to change switch port).
  In the dmesg there isn't any error, but the unique way I've found to
  recover from this situation is to reload the kernel module.

  Dmesg excerpt:
  [ 1170.161410] nfs: server debos.local not responding, timed out
  [ 1170.161428] nfs: server debos.local not responding, timed out
  [ 1170.161434] nfs: server debos.local not responding, timed out
  [ 1170.161440] nfs: server debos.local not responding, timed out
  [ 1170.161446] nfs: server debos.local not responding, timed out

  sudo modprobe -r atl1c
  [ 1815.507078] atl1c 0000:04:00.0: PCI INT A disabled

  sudo modprobe atl1c
  [ 1817.585779] atl1c 0000:04:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
  [ 1817.585793] atl1c 0000:04:00.0: setting latency timer to 64
  [ 1817.706976] atl1c 0000:04:00.0: version 1.0.1.0-NAPI
  [ 1817.728007] atl1c 0000:04:00.0: irq 45 for MSI/MSI-X
  [ 1817.786798] ADDRCONF(NETDEV_UP): eth0: link is not ready
  [ 1817.789431] ADDRCONF(NETDEV_UP): eth0: link is not ready
  [ 1819.363832] atl1c 0000:04:00.0: atl1c: eth0 NIC Link is Up<100 Mbps Full Duplex>
  [ 1819.365024] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
  [ 1830.099339] eth0: no IPv6 routers present

  and NFS recover succesfully.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-29-generic 3.2.0-29.46
  ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
  Uname: Linux 3.2.0-29-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC275 Analog [ALC275 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  scorp      2962 F.... pulseaudio
   /dev/snd/controlC1:  scorp      2962 F.... pulseaudio
   /dev/snd/controlC0:  scorp      2962 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xde100000 irq 44'
     Mixer name	: 'Realtek ALC275'
     Components	: 'HDA:10ec0275,104d4100,00100005'
     Controls      : 19
     Simple ctrls  : 11
  Card1.Amixer.info:
   Card hw:1 'Speaker'/'USB Speaker at usb-0000:00:1d.0-1.2, full speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB0c76:160c'
     Controls      : 2
     Simple ctrls  : 1
  Card2.Amixer.info:
   Card hw:2 'NVidia'/'HDA NVidia at 0xd3000000 irq 17'
     Mixer name	: 'Nvidia GPU 0b HDMI/DP'
     Components	: 'HDA:10de000b,104d4100,00100200'
     Controls      : 24
     Simple ctrls  : 4
  Date: Tue Aug 14 15:36:02 2012
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
  MachineType: Sony Corporation VPCS13V9E
  ProcEnviron:
   LC_CTYPE=it_IT.UTF-8
   TERM=xterm
   PATH=(custom, user)
   LANG=it_IT.UTF-8
   SHELL=/bin/zsh
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic root=UUID=cf9df1c2-5aa1-413b-835a-cbbe17b7b168 ro
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-29-generic N/A
   linux-backports-modules-3.2.0-29-generic  N/A
   linux-firmware                            1.79
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/21/2010
  dmi.bios.vendor: INSYDE
  dmi.bios.version: R2100Q3
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnINSYDE:bvrR2100Q3:bd09/21/2010:svnSonyCorporation:pnVPCS13V9E:pvrC10504ZE:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VPCS13V9E
  dmi.product.version: C10504ZE
  dmi.sys.vendor: Sony Corporation

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