* Management Stack based of Salt Stack in dom0 - [documentation](https://www.qubes-os.org/doc/salt/)
* Out of the box Whonix setup
* UEFI support
* Updated GPU drivers in dom0
* Colorful window application icons (instead of just colorful lock icon)
* PV Grub support ([documentation](https://www.qubes-os.org/doc/managing-vm-kernel/#tocAnchor-1-3))
* Out of the box USB VM setup, including [handling USB mouse](https://github.com/QubesOS/qubes-app-linux-input-proxy/blob/master/README.md)
* Xen upgraded to 4.6, for better hardware support (especially Skylake platform)
* Improve updates proxy flexibility - especially repositories served over HTTPS
You can get detailed description in [completed github issues](https://github.com/QubesOS/qubes-issues/issues?q=is%3Aissue+sort%3Aupdated-desc+milestone%3A%22Release+3.1%22+label%3Arelease-notes+is%3Aclosed)
Known issues
------------
* Installation image does not fit on DVD, requires either DVD DL, or USB stick (5GB or more)
* Windows Tools: `qvm-block` does not work
* Some icons in the Qubes Manager application might not be drawn correctly when using the Xfce4 environment in Dom0. If this bothers you, please use the KDE environment instead.
* USB mouse (in case of USB VM) does not work at first system startup (just after completing firstboot). Workaround: restart the system.
* For other known issues take a look at [our tickets](https://github.com/QubesOS/qubes-issues/issues?q=is%3Aopen+is%3Aissue+milestone%3A%22Release+3.1%22+label%3Abug)
It is advised to install updates just after system installation to apply bug fixes for (some of) the above problems.
Downloads
---------
See [Qubes Downloads](https://www.qubes-os.org/downloads/).
Installation instructions
-------------------------
See [Installation Guide](https://www.qubes-os.org/doc/installation-guide/).
Upgrading
---------
### From R3.0
The easiest and safest way to upgrade to Qubes R3.1 is to install it from
scratch and use [qubes backup and restore tools](https://www.qubes-os.org/doc/backup-restore/) for
