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[Bug 856810] Re: Boot hangs at "Booting system without full network configuration..."

 

In my case also manual symlinking of /var/run->/run and /var/lock-/run/lock fixed my issues.
In my case the problem was caused by dbus. As long as I did not symlink /var/run and /var/lock dbus could not be started and prevented practically anything else to run.
Although dbus created /var/run/dbus/pid and /var/run/dbus/system_bus_socket but the process listed in pid was never running. After removing the pid, restarting dbus sometimes worked sometimes not but when dbus could be started gdm or even lightdm could be started successfully and gui was working fine.

So probably you can simulate this error having 
/var/run, /var/lock, /run, /run/lock all as different directories and if dbus fails with this config then there you go.

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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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