Comment 17 for bug 1313784

Upgrading from 15.10 to 16.04.1: my last messages on the terminal is:
<code>
update-initramfs: deferring update (trigger activated)
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.4.0-36-generic
Found linux image: /boot/vmlinuz-4.2.0-42-generic
Found initrd image: /boot/initrd.img-4.2.0-42-generic
Found linux image: /boot/vmlinuz-4.2.0-41-generic
Found initrd image: /boot/initrd.img-4.2.0-41-generic
Found linux image: /boot/vmlinuz-4.2.0-38-generic
Found initrd image: /boot/initrd.img-4.2.0-38-generic
Found linux image: /boot/vmlinuz-4.2.0-36-generic
Found initrd image: /boot/initrd.img-4.2.0-36-generic
Found linux image: /boot/vmlinuz-4.2.0-17-generic
Found initrd image: /boot/initrd.img-4.2.0-17-generic
UUID = vom Btrfs-Dateisystem gefunden
Startmenü für ein Btrfs-Dateisystem eingefügt
Found memtest86+ image: /memtest86+.elf
Found memtest86+ image: /memtest86+.bin
File descriptor 3 (pipe:[9852102]) leaked on lvs invocation. Parent PID 18816: /bin/sh
</code>
After that the upgrade hangs, I am still investigating&trying to finish it.