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These release notes for Ubuntu 15.10 (Wily Werewolf) provide an overview of the release and document the known issues with Ubuntu 15.10 and its flavors.

Support lifespan

Ubuntu 15.10 will be supported for 9 months for Ubuntu Desktop, Ubuntu Server, Ubuntu Core, Kubuntu, Ubuntu Kylin along with all other flavours.

Official flavour release notes

Find the links to release notes for official flavors here.

Get Ubuntu 15.10

Download Ubuntu 15.10

Images can be downloaded from a location near you.

You can download ISOs from: (Ubuntu Desktop, Server, and Snappy Core) (Less Popular Ubuntu Images) (Ubuntu Cloud Server) (Ubuntu Netboot) (Kubuntu) (Lubuntu) (Ubuntu Studio) (Ubuntu GNOME) (Ubuntu Kylin) (Ubuntu MATE) (Xubuntu)

Upgrading from Ubuntu 15.04

To upgrade on a desktop system:

To upgrade on a server system:

Note that the server upgrade will use GNU screen and automatically re-attach in case of dropped connection problems.

There are no offline upgrade options for Ubuntu Desktop and Ubuntu Server. Please ensure you have network connectivity to one of the official mirrors or to a locally accessible mirror and follow the instructions above.

New features in 15.10

Updated Packages

As with every new release, packages--applications and software of all kinds--are being updated at a rapid pace. Many of these packages came from an automatic sync from Debian's unstable branch; others have been explicitly pulled in for Ubuntu 15.10.

For a list of all packages being accepted for Ubuntu 15.10, please subscribe to wily-changes.

Linux kernel 4.2

Linux 4.2 is another exciting update with the following highlights:

A new kernel for the Raspberry Pi 2 has also landed in the official archive.

Ubuntu Desktop

The general theme for 15.10 on the desktop is one of bug fixes and incremental quality improvements as well as a more significant change in the move to systemd as an init system.


Unity has had many bugs fixed and new features added. Locally integrated menus are now available for unfocussed windows. There have been a number of usability improvements to the dash.




LibreOffice 5.0.2 brings a lot of improvements to entire package. For more information on these improvements please see the LibreOffice release notes available here.

Ubuntu Server

OpenStack Liberty

Ubuntu 15.10 includes the latest OpenStack release, Liberty, including the following components:

Ubuntu 15.10 provides Swift 2.5.0 including experimental support for erasure coded storage.

Please refer to the OpenStack Liberty release notes for full details of this release of OpenStack.

OpenStack Liberty is also provided via the Ubuntu Cloud Archive for OpenStack Liberty for Ubuntu 14.04 LTS users.

Ubuntu 15.10 also includes the second Ubuntu release of of the Nova driver for LXD ('nova-compute-lxd'). This driver should not be considered ready for production use and is still provided for experimentation and early testing at this point in time in preparation for its first GA release in 16.04.

WARNING: Upgrading an OpenStack deployment is a non-trivial process and care should be taken to plan and test upgrade procedures which will be specific to each OpenStack deployment.

Make sure you read the OpenStack Charm Release Notes for more information about how to deploy Ubuntu OpenStack using Juju.


Juju, the service orchestration tool for Ubuntu, has been updated to the latest current stable release, 1.24.6. See the upstream release notes for full details of all new features and improvements in this release.

libvirt 1.2.16

Libvirt has been updated to the 1.2.16 release.

qemu 2.3

Qemu has been updated to the 2.3 release.

See for details.

Open vSwitch 2.4.0

Ubuntu 15.10 includes the latest release of Open vSwitch, 2.4.0.

Ubuntu 15.10 also includes an experimental preview of Open vSwitch integrated with DPDK (Data Plane Development Kit) enabling fast packet processing through userspace usage of compatible networking cards - see the openvswitch-switch-dpdk package for more details.

Ceph 0.94.3

Ubuntu 15.10 includes the latests stable release of Ceph, 0.94.3 'Hammer'.

For full details on the Ceph Hammer release, please refer to the upstream release notes.

Known issues

As is to be expected, with any release, there are some significant known bugs that users may run into with this release of Ubuntu 15.10. The ones we know about at this point (and some of the workarounds), are documented here so you don't need to spend time reporting these bugs again:

Boot, installation and post-install


Graphics and Display

Official flavours

The release notes for the official flavours can be found at the following links:

More information

Reporting bugs

Your comments, bug reports, patches and suggestions will help fix bugs and improve the quality of future releases. Please report bugs using the tools provided.

If you want to help out with bugs, the Bug Squad is always looking for help.

Participate in Ubuntu

If you would like to help shape Ubuntu, take a look at the list of ways you can participate at

More about Ubuntu

You can find out more about Ubuntu on the Ubuntu website and Ubuntu wiki.

To sign up for future Ubuntu development announcements, please subscribe to Ubuntu's development announcement list at:

WilyWerewolf/ReleaseNotes (last edited 2016-01-21 17:48:59 by jdstrand)