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[Aere Greenway <1389904@xxxxxxxxxxxxxxxxxx>]

I tried a system-recovery boot of the '-39' kernel.

I could 'drop to root prompt', and do apt-get commands, but on
attempting that, it complained that it was not using a read-only lock
file, and the apt-get commands would fail because it could not get the
lock.

The root command prompt is in my dvorak keyboard layout, so I can easily
type things.

What do I need to type to remove the latest version of the package
(xserver-xorg-video-intel 2:2.99.910-0ubuntu1.2), so it goes back to
using the xserver-xorg-video-intel 2:2.99.910-0ubuntu1 version?

If I could do that, I could at least verify that it is this package
version that is causing the problem.  At this point, I am only guessing
that is the culprit.

-- 
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https://bugs.launchpad.net/bugs/1389904

Title:
  With the recent update to xserver-xorg-video-intel, system boots to a
  black screen

Status in “xserver-xorg-video-intel” package in Ubuntu:
  Incomplete

Bug description:
  The latest system updates for Lubuntu 14.04 includes an update to the
  i915 display driver, which this machine uses.

  After applying updates and rebooting, at the end of the boot process,
  where normally the login screen appears, the screen remains blank
  (with a black background color).

  That change has rendered my Lubuntu 14.04 partition completely
  unusable, even when booting earlier versions of the kernel.
  Regardless the kernel level booted, the system now boots to a blank
  screen.

  Because of this, I had to report the error on my UbuntuStudio 14.04
  partition, to which I have not yet applied updates.  So the level of
  the Intel i915 driver package in this error report is the version
  prior to the updated version that (probably) caused the problem.

  1. The release of ubuntu with the problem is Lubuntu 14.04.1, with a
  kernel version ending in ".39".

  2. The last working version of xserver-xorg-video-intel is
  2:2.99.910-0ubuntu1 I can't boot by Lubuntu partition anymore to tell
  you the version number that fails, but it is later than the indicated
  version.

  3. Prior to installing system updates, my Lubuntu 14.04.01 system
  worked fine, and I was able to boot it and perform my suite of tests
  (it's a test system).  After applying updates, it boots to a blank
  screen, and I cannot do anything with it.  I expected the login screen
  to appear, but it doesn't, and there is no error message.

  4. After applying system updates I expected my system to reboot
  normally, allowing me to login.  Instead, a blank screen is displayed,
  with no error message, and the login screen does not appear after many
  minutes of waiting.  If I hit the power button, it initiates shutdown.
  Hitting several keyboard characters (or typing my password to the
  blank screen) had no effect.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-32.57-lowlatency 3.13.11.4
  Uname: Linux 3.13.0-32-lowlatency i686
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: i386
  CurrentDesktop: XFCE
  Date: Wed Nov  5 16:13:54 2014
  InstallationDate: Installed on 2014-04-28 (191 days ago)
  InstallationMedia: Ubuntu-Studio 14.04 LTS "Trusty Tahr" - Release i386 (20140416.3)
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: No upgrade log present (probably fresh install)

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