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[provost <1093217@xxxxxxxxxxxxxxxxxx>]

This is what worked for me.
1) Shut down laptop
2) Remove battery and unplug the power supply.
3) Press and hold power button for more than 40 seconds.
4) replace back battery and plug in power.
5) Boot into Ubuntu.Ubuntu boots normally without any delay.

Apparantly there is a bios level optimization put in by lenevo that
prevents battery charging  until it reches below a certain percentage.
They claim this is to improve battery life. It seems that this bios
level optimization messes with Ubuntu start up and hangs it.

Steps mentioned above will disable this setting and apparantly fixes ubuntu boot delay.
I have not seen boot delay after this fix for more than 3 weeks now.
I am on 
~$ uname -a
Lenovo-Z580 3.8.0-33-generic #48-Ubuntu SMP Wed Oct 23 09:16:58 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

P.S. the steps mentioned above also fixes Windows 8/8.1 glitch of
battery not charging even when power adapter is connected

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https://bugs.launchpad.net/bugs/1093217

Title:
  8086:0166 [Lenovo IdeaPad Z580] 12.04-13.10 10-20min boot delay (From
  3.2.0.29->3.12-rc2)

Status in The Linux Kernel:
  Unknown
Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  On updating the kernel from 3.2.0.29 to any later version (3.2.0.30)
  and above, Ubuntu will not boot. I see a blank screen with a cursor
  but nothing happens after that.

  Trying to boot into recovery mode is not useful either.

  Booting into an older version of the kernel (3.2.0.29) is successful.

  I have seen this issue with all kernels after 3.2.0.29 till date :
  3.2.0.31, 3.2.0.32, 3.2.0.33, 3.2.0.34, 3.2.0.35

  ---
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu15.1
  Architecture: i386, AMD64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  abhishek   2104 F.... pulseaudio
   /dev/snd/pcmC0D0p:   abhishek   2104 F...m pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf0610000 irq 46'
     Mixer name	: 'Intel PantherPoint HDMI'
     Components	: 'HDA:10ec0269,17aa4022,00100202 HDA:80862806,80860101,00100000'
     Controls      : 26
     Simple ctrls  : 12
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=4b3dd96d-8b88-4dbf-97d4-e2d78e5ad0fc
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
  MachineType: LENOVO IdeaPad Z580
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic-pae root=UUID=a24e74a5-a245-4b37-b63c-96869939bf5c ro quiet splash
  ProcVersionSignature: Ubuntu 3.2.0-29.46-generic-pae 3.2.24
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-29-generic-pae N/A
   linux-backports-modules-3.2.0-29-generic-pae  N/A
   linux-firmware                                1.79.1
  StagingDrivers: rts5139 mei
  Tags:  precise running-unity staging
  Uname: Linux 3.2.0-29-generic-pae i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin netdev plugdev sambashare sudo
  dmi.bios.date: 06/11/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 5FCN34WW
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Lenovo
  dmi.board.vendor: LENOVO
  dmi.board.version: Lenovo Z580
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: Intel Corporation
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnLENOVO:bvr5FCN34WW:bd06/11/2012:svnLENOVO:pnIdeaPadZ580:pvrLenovoZ580:rvnLENOVO:rnLenovo:rvrLenovoZ580:cvnIntelCorporation:ct9:cvr0.1:
  dmi.product.name: IdeaPad Z580
  dmi.product.version: Lenovo Z580
  dmi.sys.vendor: LENOVO

  These logs were collected from 3.2.0.29 version which boots
  successfully

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