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[teo1978 <teo8976@xxxxxxxxx>]

** Summary changed:

- Boot gets stuck at purple "Ubuntu ...." screen forever if running from battery
+ System randomly won't complete boot

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https://bugs.launchpad.net/bugs/1483388

Title:
  System randomly won't complete boot

Status in unity package in Ubuntu:
  New

Bug description:
  I am not sure at all what package this bug is; I report it against
  Unity because I get to see the purple screen...

  Steps to reproduce:
  - turn on the laptop while not connected to AC power, but with more than enough battery charge (tested with battery completely charged)

  Expected result:
  should boot fine

  Observed result:
  When the purple Ubuntu loading screen appears and the four dots below the word "Ubuntu" are all filled in red, the system gets stuck at that screen for fucking ever.
  No matter how many times I retry, it will always remain stuck there.
  If I connect the charger and reboot, then it works fine.

  This REGRESSION has appeared after some recent automatic updates. This
  didn't use to happen before. I had booted with  battery power
  thousands of time, though it's not something that I do very often so i
  can't tell exactly when the regression appeared.

  
  Before the purple screen appears, for a fraction of a second I've been able to see a black screen full of messages, probably error messages, while normally (when boot works fine) there would only be one usb-related error message.

  Please let me know from which log I can retrieve those error messages
  so that I can post them here.

  Don't tell me to update the bios, because this used to work on the
  very same machine, so the issue is obviously in Ubuntu.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity 7.2.5+14.04.20150603-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-61.100-generic 3.13.11-ckt22
  Uname: Linux 3.13.0-61-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CurrentDesktop: Unity
  Date: Mon Aug 10 21:15:32 2015
  InstallationDate: Installed on 2013-10-11 (668 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  SourcePackage: unity
  UpgradeStatus: Upgraded to trusty on 2014-05-24 (443 days ago)

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