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---
lang: en
layout: doc
permalink: /doc/releases/3.0/release-notes/
redirect_from:
- /en/doc/releases/3.0/release-notes/
ref: 19
title: Qubes R3.0 release notes
---
### Qubes R3.0 Release Notes
This Qubes OS release is dedicated to the memory of Caspar Bowden.
## New features since 2.0
* HAL (Hypervisor Abstraction Layer) - based on libvirt, opens a whole new
possibilities of using different hypervisors. Currently Qubes OS uses Xen.
* Xen 4.4 - many new features, but for us the most important is much more
mature libxl toolstack.
* Qrexec 3 - greatly improved performance by using direct VM-VM connections and
bigger buffers.
* Debian templates gets official support.
* Whonix templates
* Build system improvements - especially support for distribution-specific
plugins (makes supporting multiple distributions much easier) and building
templates using DispVM.
* Automated tests - makes much easier to find bugs, before its even shipped to users
## Known issues
* Windows Tools: `qvm-block` does not work
* UEFI is not supported, you need to enable "legacy boot" in BIOS before installing Qubes OS
* 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.
* If your GPU is not correctly supported by the Dom0 kernel (e.g. the 3D desktop effects do not run smoothly) then you might experience "heaviness" with Windows 7-based AppVMs. In that case, please solve the problem with your GPU support in Dom0 in the first place (by using a different kernel), or install Qubes OS on a different 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+3.0%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](/doc/QubesDownloads/).
## Installation instructions
See [Installation Guide](/doc/installation-guide/).
## Upgrading
### From R3.0 release candidate
If you are using Qubes R3.0rc1, R3.0rc2 or R3.0rc3, just install system updates, there is no special steps required.
### From R2.0 or earlier
The easiest and safest way to upgrade to Qubes R3.0 is to install it from scratch and use [qubes backup and restore tools](/doc/backup-restore/) for migrating of all of the user VMs.
Users of Qubes R2 can upgrade using [experimental procedure](/doc/upgrade-to-r3.0/).

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========================
Qubes R3.0 release notes
========================
Qubes R3.0 Release Notes
------------------------
This Qubes OS release is dedicated to the memory of Caspar Bowden.
New features since 2.0
^^^^^^^^^^^^^^^^^^^^^^
- HAL (Hypervisor Abstraction Layer) - based on libvirt, opens a whole new possibilities of using different hypervisors. Currently Qubes OS uses Xen.
- Xen 4.4 - many new features, but for us the most important is much more mature libxl toolstack.
- Qrexec 3 - greatly improved performance by using direct VM-VM connections and bigger buffers.
- Debian templates gets official support.
- Whonix templates
- Build system improvements - especially support for distribution-specific plugins (makes supporting multiple distributions much easier) and building templates using DispVM.
- Automated tests - makes much easier to find bugs, before its even shipped to users
Known issues
^^^^^^^^^^^^
- Windows Tools: ``qvm-block`` does not work
- UEFI is not supported, you need to enable “legacy boot” in BIOS before installing Qubes OS
- 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.
- If your GPU is not correctly supported by the Dom0 kernel (e.g. the 3D desktop effects do not run smoothly) then you might experience “heaviness” with Windows 7-based AppVMs. In that case, please solve the problem with your GPU support in Dom0 in the first place (by using a different kernel), or install Qubes OS on a different 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+3.0%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 :doc:`Installation Guide </user/downloading-installing-upgrading/installation-guide>`.
Upgrading
^^^^^^^^^
From R3.0 release candidate
---------------------------
If you are using Qubes R3.0rc1, R3.0rc2 or R3.0rc3, just install system updates, there is no special steps required.
From R2.0 or earlier
--------------------
The easiest and safest way to upgrade to Qubes R3.0 is to install it from scratch and use :doc:`qubes backup and restore tools </user/how-to-guides/how-to-back-up-restore-and-migrate>` for migrating of all of the user VMs.
Users of Qubes R2 can upgrade using :doc:`experimental procedure </user/downloading-installing-upgrading/upgrade/3_0>`.

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---
lang: en
layout: doc
permalink: /doc/releases/3.0/schedule/
redirect_from:
- /en/doc/releases/3.0/schedule/
ref: 20
title: Qubes R3.0 release schedule
---
| Date | Stage |
| -----------:| ------------------------------------- |
| 5 Sep 2015 | current-testing freeze before 3.0-rc3 |
| 15 Sep 2015 | 3.0-rc3 release |
| 1 Oct 2015 | 3.0 release |

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===========================
Qubes R3.0 release schedule
===========================
.. list-table::
:widths: 11 11
:align: center
:header-rows: 1
* - Date
- Stage
* - 5 Sep 2015
- current-testing freeze before 3.0-rc3
* - 15 Sep 2015
- 3.0-rc3 release
* - 1 Oct 2015
- 3.0 release