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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1279484 Title: Hard hangs with Intel 82579LM NIC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-saucy/+bug/1279484/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs