Based on what I saw, it appears to be an issue with nouveau's handling of KMS.
A workaround is to switch to a different virtual terminal and back to tty7. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/762922 Title: Corrupted screen at "Unlocking the disk" phase on an encrypted LVM when using nouveau -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs