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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 1378894

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

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https://bugs.launchpad.net/bugs/1378894

Title:
  Set CONFIG_PATA_MACIO=y

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Had some time to fool around with Ubuntu on a PowerBook3,5. I
  discovered that the 3.16 kernel has a regression in it, it does not
  set CONFIG_PATA_MACIO=y. As a result /dev/sda is not available in the
  initramfs and the machine cannot mount the root filesystem. This is a
  regression from the 3.13.0-37 kernel in trusty.

  To reproduce:
  1) Set up a Powerbook or Powermac running Ubuntu (I have 12.04 on a Powerbook3,5, with the 3.13.0-37 kernel installed)
  2) Install the 3.16.0-21.28 kernel from https://launchpad.net/ubuntu/+source/linux/3.16.0-21.28/+build/6437990
  3) Reboot

  Expected results:
  The machine reboots normally

  Actual results:
  Boot fails in the initramfs with the error "gave up waiting for boot device"

  From the busy box prompt, running "modprobe pata_macio" then "exit"
  allows the machine to keep booting.

  A permanent workaround is to add pata_macio to /etc/initramfs-
  tools/modules and then update the initramfs

  There is a brief discussion of a similar problem in Precise in bug
  876982. CONFIG_PATA_MACIO=y was set in 3.2.0-2.6.

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