[Bug 991522] Re: 12.04 Alternative CD upgrade fails with "Failed to fetch cdrom"

[Xiaoguang Qiao]

Removing ubuntu-12.04-desktop-i386.iso from Sources solved the problem
for me.

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Title:
  12.04 Alternative CD upgrade fails with "Failed to fetch cdrom"

Status in “debian-installer” package in Ubuntu:
  New

Bug description:
  Running in the shell with the alternative CD:

  dirk at mt-lincoln:~$ gksu "sh /media/'Ubuntu 12.04 LTS
  i386'/cdromupgrade"

  (gksu:2209): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
  authenticate 'precise.tar.gz' against 'precise.tar.gz.gpg' 
  extracting 'precise.tar.gz'
  WARNING: Failed to read mirror file

  (precise:2215): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
  gpgv: Signature made Mon 23 Apr 2012 03:03:22 PM MDT using DSA key ID FBB75451
  gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key <cdimage at ubuntu.com>"
  dirk at mt-lincoln:~$ 

  The dialog reports the error:

  Failed to fetch cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release
  i386 (20120423)]/pool/main/p/patch/patch_2.6.1-3_i386.deb Wrong CD-ROM

  I tried with both not updating packages from the Internet and then
  trying it again allowing the packages to the updated.  Failed with the
  same error.

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