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[Launchpad Bug Tracker <1261744@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/1261744

Title:
  Ubuntu 13.10 x64 kernel 3.11.0-14-generic crash

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  On a Dell Poweredge 720, Kubuntu 13.10 x64, LInux Kernel 3.11.0-14-generic, when setting /etc/sysctl.conf:
  kernel.sched_autogroup_enabled=0
  Kernel fails to boot. This error is 100% reproducible and when I comment out that line in sysctl.conf everything works fine.
  The machine is 2x Xeon E2670 with 64GB of RAM, I've attached lspci output and also dmesg output during a normal boot.

  It starts failing when it detects  hard drives, right after it
  detected ixgbe network driver and when systemd starts to launch
  programs. If I boot it in safe mode with that option set to 0 and then
  choose resume in the menu, everything works fine. Apparently when
  systemd starts something that conflicts with the hard drive detection
  when autogroup_enabled=0.

  I've attached screen shots from the KVM.
  Please let me know if you need any other information.

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