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[Launchpad Bug Tracker <1086708@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/1086708

Title:
  [Dell Precision T3400] Intermittent ethernet internet connection
  Ubuntu 12.04 (networking using the tg3 driver)

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  I have spent hours trying out dozens of solutions from the
  ubuntuforums and askubuntu, nothing seems to help. Ethernet cable and
  plug (in office wall with many ethernet plugs available) switched to
  test if this is the problem.

  My internet connection sporadically and regularly drops. Sometimes it
  is that webpages take a long time to load, or never do. Sometimes this
  can be fixed by reloading the page, sometimes this does nothing. In
  those cases the only solution is to either disable and enable
  networking or click on the supposedly connected wired connection I am
  using to get it to reconnect manually. In both these cases the
  connection is usually back within 5 seconds (very rarely I have to do
  this twice).

  I have reinstalled network manager and resolvconf, I have disbled
  ipv6, I have edited NetworkManager.conf (along with a few other things
  that all don't seem to work). Generally the connection is stable for a
  long time following a reboot, but once it starts dropping out, it can
  stay stable for a half hour, or 2 minutes, and there seems to be no
  way to know.

  Sometimes trying to load a page or an element in a page will trigger
  network manager to react to the loss of connection. What I mean is
  that in this case both skype and dropbox show that they have gone
  offline, and the network manager icon appears to look for a
  connection. This then happens within 5 seconds (as when I do this
  manually) and the connection is back. Again, this then can hold for a
  half hour or only 2 minutes, or anything in between.

  #### sudo ifconfig -a ####
  eth0      Link encap:Ethernet  HWaddr 00:1e:c9:3e:33:d6
            inet addr:172.16.10.253  Bcast:172.16.255.255  Mask:255.255.0.0
            UP BROADCAST RUNNING MULTICAST  MTU:1492  Metric:1
            RX packets:204291 errors:0 dropped:0 overruns:0 frame:0
            TX packets:73962 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:100
            RX bytes:126731107 (126.7 MB)  TX bytes:18598744 (18.5 MB)
            Interrupt:17

  lo        Link encap:Local Loopback
            inet addr:127.0.0.1  Mask:255.0.0.0
            UP LOOPBACK RUNNING  MTU:16436  Metric:1
            RX packets:3340 errors:0 dropped:0 overruns:0 frame:0
            TX packets:3340 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:245691 (245.6 KB)  TX bytes:245691 (245.6 KB)

  #### cat /etc/network/interfaces ####
  auto lo
  iface lo inet loopback

  #### dmesg | grep -e eth0 -e bcm ####
  [    2.833361] tg3 0000:04:00.0: eth0: Tigon3 [partno(BCM95754) rev b002] (PCI Express) MAC address 00:1e:c9:3e:33:d6
  [    2.833365] tg3 0000:04:00.0: eth0: attached PHY is 5787 (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[0])
  [    2.833368] tg3 0000:04:00.0: eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1]
  [    2.833371] tg3 0000:04:00.0: eth0: dma_rwctrl[76180000] dma_mask[64-bit]
  [   11.257451] ADDRCONF(NETDEV_UP): eth0: link is not ready
  [   20.902607] ADDRCONF(NETDEV_UP): eth0: link is not ready
  [   23.935637] tg3 0000:04:00.0: eth0: Link is up at 1000 Mbps, full duplex
  [   23.935641] tg3 0000:04:00.0: eth0: Flow control is off for TX and off for RX
  [   23.935774] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
  [ 4720.680698] ADDRCONF(NETDEV_UP): eth0: link is not ready
  [ 4723.084274] tg3 0000:04:00.0: eth0: Link is up at 1000 Mbps, full duplex
  [ 4723.084278] tg3 0000:04:00.0: eth0: Flow control is off for TX and off for RX
  [ 4723.084408] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
  ---
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu15
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
     Subdevices: 2/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  dmat       1926 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xfdffc000 irq 45'
     Mixer name	: 'Analog Devices AD1984'
     Components	: 'HDA:11d41984,10280214,00100400'
     Controls      : 22
     Simple ctrls  : 15
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=28dc762e-200c-4ffd-97fd-83543a2b9275
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  IwConfig:
   lo        no wireless extensions.

   eth0      no wireless extensions.
  MachineType: Dell Inc. Precision WorkStation T3400
  MarkForUpload: True
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-33-generic-pae root=UUID=8fa2d784-c6e0-4aca-965a-524b1da063ac ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-33.52-generic-pae 3.2.31
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-33-generic-pae N/A
   linux-backports-modules-3.2.0-33-generic-pae  N/A
   linux-firmware                                1.79.1
  RfKill:

  Tags:  precise running-unity
  Uname: Linux 3.2.0-33-generic-pae i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm lpadmin netdev sambashare sudo
  WifiSyslog: Dec  5 10:14:28 koggies-Precision kernel: [84037.386144] type=1701 audit(1354698868.449:32): auid=4294967295 uid=1001 gid=1001 ses=4294967295 pid=10213 comm="chrome" reason="seccomp" sig=0 syscall=20 ip=0xb35ab424 code=0x50001
  dmi.bios.date: 03/21/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A04
  dmi.board.name: 0TP412
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 7
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA04:bd03/21/2008:svnDellInc.:pnPrecisionWorkStationT3400:pvr:rvnDellInc.:rn0TP412:rvr:cvnDellInc.:ct7:cvr:
  dmi.product.name: Precision WorkStation T3400
  dmi.sys.vendor: Dell Inc.

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