I did this: 1) ppa-purge ppa:xorg-edgers/ppa 2) uninstall manually some conflicts packages 3) use free graphic driver
and now the upgrade process is ok. Thank you. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1287571 Title: can not upgrade saucy to trusty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1287571/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs