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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1306955

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

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

** Tags added: precise

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https://bugs.launchpad.net/bugs/1306955

Title:
  Kernel Oops - unable to handle kernel NULL pointer dereference; EIP is
  at free_thread_info+0xb/0x30

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Since upgrading from 10.04 to 12.04, my server suffers from frequent
  freezes. I have been unable to find a pattern and the freeze
  'behaviour' is not always the same: usually the system does not
  respond at all anymore, and sometimes an error message is printed to
  the console:

  BUG: unable to handle kernel NULL pointer dereference at   (null)
  free_thread_info+0xb/0x30

  The attached kern.log file has the full error messages.

  Usually the system can reboot using Alt+SysReq+B, but sometimes that
  doesn't even work. And on rare occasions the keyboard lights start
  blinking.

  Now, there might be more than 1 problem at hand here, but at least
  I've got an error message now.

  PS: on 10.04 I also had occasional freezes, but that averaged once
  every 3 months or so. Now it happens once every three days.

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