Public bug reported:

I've actually been experiencing this bug since 12.04 first came out, and
it has persisted as I updated to each of the point releases (both kernel
and Xorg). I've narrowed the issue down to the Intel 82579LM ethernet
card.

What happens is that my system will seemingly randomly lock up.
Sometimes it will be idling with the screen off, other times I will be
in the middle of something and it just freezes. It responds to SysRq
commands (ie, I can reboot it), but nothing else.

It will always happen within 2-3 days of booting (often less) if I boot
with the ethernet cable disconnected (and network manager seems to think
it's plugged in and keeps trying to connect over and over until I
manually tell it to stop, even though this bug was supposedly fixed in
the 3.8 kernel). Sometimes it will lock up within 30 minutes of booting.

If on the other hand I boot while ethernet is plugged in, then it's
typically (but not always) much longer before it locks up, but it will
eventually still lock up within 2 weeks. I have had it lock up within 15
minutes after booting while on AC with ethernet plugged in the whole
time

The lockup doesn't seem to be dependent on the ethernet state at the
time; it has locked up both while ethernet is plugged in and
disconnected, and while on AC and battery. It's more dependent on
whether the system was booted with ethernet connected or not.

I've tried rmmod-ing e1000e after booting with the cable disconnected
and not modprobing it until ethernet is connected again, but I still get
weird ethernet related issues (like network manager repeatedly trying to
connect even when the cable is unplugged) and it locks up shortly
thereafter.

There is nothing in the logs after this happens. I've looked countless
times, even being sure to sync and unmount partitions using the SysRq
commands before rebooting.

There was one time where it went 1.5 months without locking up (on the
3.11 kernel, which does seem to trigger this less often than 3.8), and
this was after a fresh boot with ethernet connected, then I went out of
town for 1.5 months and was on wifi only. It was stable and didn't lock
up at all during this time. While this is only 1 data point, it seems to
indicate that there's something about connecting and disconnecting
ethernet that may trigger it.

I'm wondering if the NIC gets into some inconsistent state or something
that eventually triggers a bug and a hard hang?

My system is a Thinkpad T430 with integrated graphics only. I typically
connect and disconnect both AC and ethernet 2-3 times a day.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.11.0-15-generic 3.11.0-15.25~precise1
ProcVersionSignature: Ubuntu 3.11.0-15.25~precise1-generic 3.11.10
Uname: Linux 3.11.0-15-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 
k3.11.0-15-generic.
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: ALC3202 Analog [ALC3202 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  josh       5678 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xf2530000 irq 48'
   Mixer name   : 'Intel PantherPoint HDMI'
   Components   : 'HDA:10ec0269,17aa21f3,00100203 
HDA:80862806,80860101,00100000'
   Controls      : 50
   Simple ctrls  : 17
Card4.Amixer.info:
 Card hw:4 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 
unknown'
   Mixer name   : 'ThinkPad EC (unknown)'
   Components   : ''
   Controls      : 1
   Simple ctrls  : 1
Card4.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [off]
Date: Wed Feb 12 11:13:54 2014
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=1ed523ec-9bfe-4a5c-870b-a464fdc60d58
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
MachineType: LENOVO 2342CTO
MarkForUpload: True
ProcEnviron:
 LC_CTYPE=en_US.UTF-8
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/usr/bin/zsh
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-15-generic 
root=/dev/mapper/lvm-root ro quiet splash i915.i915_enable_rc6=1 
i915.i915_enable_fbc=1 intel_iommu=on
RelatedPackageVersions:
 linux-restricted-modules-3.11.0-15-generic N/A
 linux-backports-modules-3.11.0-15-generic  N/A
 linux-firmware                             1.79.9
SourcePackage: linux-lts-saucy
UpgradeStatus: No upgrade log present (probably fresh install)
UserAsoundrc:
 pcm.btheadset {
    type bluetooth
    device 00:1D:82:76:3F:32
    profile "auto"
 }
dmi.bios.date: 03/08/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G1ET93WW (2.53 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2342CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: 
dmi:bvnLENOVO:bvrG1ET93WW(2.53):bd03/08/2013:svnLENOVO:pn2342CTO:pvrThinkPadT430:rvnLENOVO:rn2342CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2342CTO
dmi.product.version: ThinkPad T430
dmi.sys.vendor: LENOVO

** Affects: linux-lts-saucy (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise qa-kernel-lts-testing running-unity

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https://bugs.launchpad.net/bugs/1279484

Title:
  Hard hangs with Intel 82579LM NIC

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