[Bug 890738] Re: Downgrading ubuntu from v11.10 to v11.04 fails

[Ubuntu Foundation's Bug Bot]

Thank you for taking the time to report this bug and helping to make
Ubuntu better.  Reviewing your log files attached to this bug report it
seems that there is a problem with your installation media (CD/DVD).
Please retry your installation with new media and if it still fails I'd
recommend testing your CD drive with other media.  In the event that is
is not in fact an error with your installation media please set the
bug's status back to New.  Thanks and good luck!

[This is an automated message.  I apologize if it reached you
inappropriately; please just reply to this message indicating so.]

** Tags added: media-error

** Changed in: ubiquity (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/890738

Title:
  Downgrading ubuntu from v11.10 to v11.04 fails

Status in “ubiquity” package in Ubuntu:
  Invalid

Bug description:
  I downgraded ubuntu from v11.10 to v11.04 because of the well-known
  nvidia driver bug, which prevents dual monitors being used. The
  installation fails.

  Your reporting system only allows one file to be attached to the report. I have attached the /var/log/syslog, since this indicates the problem:
  mkdir: cannot create directory `/target/var/lock': File exists

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