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[Louis Pastorik <856810@xxxxxxxxxxxxxxxxxx>]

I encountered this bug when upgrading from Ubuntu 11.04 to 11.10. I read
all the comments from this issue and the accompanying issue mentioned
previously, then I resolved this issue by doing the following actions
(in this order):

sudo dpkg-reconfigure lightdm
sudo apt-get purge gdm
sudo rm /var/var/dbus/pid
su root
created directories /run and /run/lock (these already existed)
moved contents of /var/run into /run and /var/lock into /run/lock,
delete directories /var/run and /var/lock
create replacement simlinks; e.g. 'ln -s /run /var/run' and 'ln -s /run/lock /var/lock'
reboot

I rebooted twice just to be sure since I went through part of this
process once, resolved it, then the problem reappeared after reboot. The
problem only stayed resolved after doing ALL of the above steps. Had I
been an uneducated user (not a techie) I would have been really angry.
Ubuntu community needs to upgrade the OS soon to fix this. This is a
huge issue since the machine UI was unusable until this fix was in
place!

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https://bugs.launchpad.net/bugs/856810

Title:
  Boot hangs at "Booting system without full network configuration..."

Status in Linaro Ubuntu Evaluation Builds:
  Confirmed
Status in “lightdm” package in Ubuntu:
  Invalid
Status in “upstart” package in Ubuntu:
  Confirmed

Bug description:
  I installed Ubuntu 11.10 beta1 64bit on a new laptop. I rebooted and
  it came up nicely.

  After that I did "apt-get update" and "apt-get dist-upgrade" to get
  the most recent fixes and installed some additional software.

  Now I do not seem to be able to boot.

  Fist I see:
  Waiting for network configuration...

  Then I see:
  Waiting up to 60 more seconds for network configuration...

  And then it just hangs forever displaying the following:
  Booting system without full network configuration...

  Nothing happens after that, no matter how long I wait. However, I can
  switch to the console with CTRL-ALT-F1 and log in from there. The
  network is configured with DHCP and it works just fine from the
  console. I do not understand what the GUI boot display is waiting for.

  I installed the system using the alternate install CD to get LVM based
  partitions with full disk encryption.

  I noticed the bug #847782 and removed the "auto eth0" entry from my
  /etc/network/interfaces. Unfortunately that did not change anything,
  it still hangs forever.

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