[Bug 743359] Re: Installer: LockFailedException: Failed to lock /target/var/cache/apt/archives/lock

[Colin Norris]

A while back I created a virtual machine with VirtualBox 4.0.12 for
Xubuntu Oneric amd64 Alpha2 (I think it was Alpha2) and that installed
and worked as expected. I later upgraded that installation via apt and
it still worked. Today I downloaded the ISO of Xubuntu Oneric amd64
Beta1 and attempted to install it over the top of the Alpha2
installation, but experienced this bug.

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https://bugs.launchpad.net/bugs/743359

Title:
  Installer: LockFailedException: Failed to lock
  /target/var/cache/apt/archives/lock

Status in “ubiquity” package in Ubuntu:
  Confirmed
Status in “ubiquity” source package in Oneiric:
  Confirmed

Bug description:
  Binary package hint: ubiquity

  Installer Crashed while installing Ubuntu 10.10 (dual boot with Win7)
  from live USB.  Crash occurred while "Checking for packages to
  remove...".

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