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63 lines
2.5 KiB
Markdown
63 lines
2.5 KiB
Markdown
---
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lang: en
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layout: doc
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permalink: /doc/releases/3.0/release-notes/
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redirect_from:
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- /en/doc/releases/3.0/release-notes/
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ref: 19
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title: Qubes R3.0 release notes
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---
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### Qubes R3.0 Release Notes
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This Qubes OS release is dedicated to the memory of Caspar Bowden.
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## New features since 2.0
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* HAL (Hypervisor Abstraction Layer) - based on libvirt, opens a whole new
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possibilities of using different hypervisors. Currently Qubes OS uses Xen.
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* Xen 4.4 - many new features, but for us the most important is much more
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mature libxl toolstack.
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* Qrexec 3 - greatly improved performance by using direct VM-VM connections and
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bigger buffers.
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* Debian templates gets official support.
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* Whonix templates
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* Build system improvements - especially support for distribution-specific
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plugins (makes supporting multiple distributions much easier) and building
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templates using DispVM.
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* Automated tests - makes much easier to find bugs, before its even shipped to users
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## Known issues
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* Windows Tools: `qvm-block` does not work
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* UEFI is not supported, you need to enable "legacy boot" in BIOS before installing Qubes OS
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* 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.
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* 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.
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* 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)
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It is advised to install updates just after system installation to apply bug fixes for (some of) the above problems.
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## Downloads
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See [Qubes Downloads](/doc/QubesDownloads/).
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## Installation instructions
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See [Installation Guide](/doc/installation-guide/).
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## Upgrading
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### From R3.0 release candidate
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If you are using Qubes R3.0rc1, R3.0rc2 or R3.0rc3, just install system updates, there is no special steps required.
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### From R2.0 or earlier
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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.
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Users of Qubes R2 can upgrade using [experimental procedure](/doc/upgrade-to-r3.0/).
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