Public bug reported: I've tried installing 16.04 with the Beta 2 and an earlier version and ran into this problem both times. I tried installing with the options download updates, install third party drivers and disabling secure boot.
ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ubiquity 2.21.51 ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6 Uname: Linux 4.4.0-15-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 CasperVersion: 1.368 CurrentDesktop: Unity Date: Thu Apr 7 13:03:32 2016 InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --- LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: ubiquity UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: ubiquity (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug ubiquity-2.21.51 ubuntu xenial ** Attachment added: "syslog" https://bugs.launchpad.net/bugs/1567445/+attachment/4627574/+files/syslog -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1567445 Title: ubi-prepare failed with exit code 255 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1567445/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs