I had this problem. Thankfully I found this bug report. I did NOT choose not to remove obselete software - in fact I was careful to remove obselete software. I also made sure my feisty system was totally up to date before starting.
My system has evolved from dapper drake thru edgy, eisty, gutsy, if that is what is meant by 'started with an earlier version than feisty'. This has been the worst upgrade so far. Avoiding this rubbish is why I left gentoo. Perhaps time to look at it again? -- Device-mapper errors: dm-linear, lookup failed https://bugs.launchpad.net/bugs/115616 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs