I solved the issue in a different way specific to my case. After installation failed as reported in this bug, I just continued using the LiveCD and ran the Installer from the Desktop.
But, before starting installation, I noticed before that Ubiquity was thinking that my old /home partition had installed Ubuntu 11.04, and it was because there was an 'etc' directory I placed there for an eventual backup. So, I think Ubiquity detected my /home partition as a target installation since it had a '/etc' directory inside. So I just renamed my 'etc' directory to 'etc.bk' and continued the rest of the installation without problems. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/689816 Title: ubiquity migration assistant did not unmount other Linux volumes -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs