[02:17] <CarlFK> Dec 19 01:22:25 finish-install: info: Running /usr/lib/finish-install.d/95umount
[02:17] <CarlFK> Dec 19 01:22:28 finish-install: umount: can't umount /dev/pts: Device or resource busy
[02:17] <CarlFK> that seems to prevent the install from finishing, and thus rebooting.
[02:26] <CarlFK> https://bugs.edge.launchpad.net/ubuntu/+source/debian-installer/+bug/462315  looks the same, I appended my logs