OK. I've found a solution with Percherie's help. On Synaptic, just after starting Live-session, I suppress ubiquity-slideshow-lubuntu package. And run Installation without mistake.
So the bug is on ubiquity-slideshow-lubuntu (and ubiquity-slideshow- xubuntu) package. (version 58) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/996568 Title: Ubiquity 2.10.16: Lubuntu 12.04 Install Crash on slideshow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/996568/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs