When you see the "unrecoverable error" message, switch to a virtual terminal (ctrl-alt-f2) and either copy /var/log/syslog and /var/log/installer/debug to a usb disk, then attach them to this bug, or run `apport-collect 567899`, which should attach the logs for you.
When you see the "unrecoverable error" message, switch to a virtual terminal (ctrl-alt-f2) and either copy /var/log/syslog and /var/log/ installer/ debug to a usb disk, then attach them to this bug, or run `apport-collect 567899`, which should attach the logs for you.