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[Launchpad Bug Tracker <1261744@xxxxxxxxxxxxxxxxxx>]

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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.

** Affects: linux (Ubuntu)
     Importance: Low
         Status: Incomplete

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Ubuntu 13.10 x64 kernel 3.11.0-14-generic crash
https://bugs.launchpad.net/bugs/1261744
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