Qubes R4.0 release notes
========================
New features since 3.2
----------------------
* Core management scripts rewrite with better structure and extensibility, [API documentation][api-doc]
* [Admin API][admin-api] allowing strictly controlled managing from non-dom0
* All `qvm-*` command-line tools rewritten, some options have changed
* Renaming VM directly is prohibited, there is GUI to clone under new name and remove old VM
* Use [PVH][qsb-37] and [HVM][hvm-switch] by default to [mitigate Meltdown & Spectre][qsb-37] and lower the [attack surface on Xen][qsb-24]
* Create USB VM by default
* [Multiple Disposable VMs templates support][dispvm-ticket]
* New [backup format][backup-format] using scrypt key-derivation function
* Non-encrypted backups no longer supported
* [split VM packages][packages-split], for better support minimal, specialized templates
* [Qubes Manager decomposition][manager-ticket] - domains and devices widgets instead of full Qubes Manager; devices widget support also USB
* [More flexible firewall interface][vm-interface] for ease unikernel integration
* Template VMs do not have network interface by default, [qrexec-based updates proxy][qrexec-proxy] is used instead
* More flexible IP addressing for VMs - [custom IP][custom-ip], [hidden from the IP][hide-ip]
* More flexible Qubes RPC policy - [related ticket][qrexec-policy-keywords], [documentation][qrexec-doc]
* [New Qubes RPC confirmation window][qrexec-confirm], including option to specify destination VM
* Dom0 update to Fedora 25 for better hardware support
* Kernel 4.14.x
You can get detailed description in [completed github issues][github-release-notes]
Known issues
------------
* On some laptops (for example Librem 15v2), touchpad do not work directly after installation. Reboot the system to fix the issue.
* List of USB devices may contain device identifiers instead of name
* 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+4.0%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 [Installation Guide](https://www.qubes-os.org/doc/installation-guide/).
Upgrading
---------
There is no in-place upgrade path from earlier Qubes versions. The only
supported option to upgrade to Qubes R4.0 is to install it from scratch and use
[qubes backup and restore tools][backup] for migrating of all of the user VMs.
[backup]: https://www.qubes-os.org/doc/backup-restore/
[github-release-notes]: https://github.com/QubesOS/qubes-issues/issues?q=is%3Aissue+sort%3Aupdated-desc+milestone%3A%22Release+4.0%22+label%3Arelease-notes+is%3Aclosed
[custom-ip]: https://github.com/QubesOS/qubes-issues/issues/1477
[hide-ip]: https://github.com/QubesOS/qubes-issues/issues/1143
[packages-split]: https://github.com/QubesOS/qubes-issues/issues/2771
[hvm-switch]: https://github.com/QubesOS/qubes-issues/issues/2185
[manager-ticket]: https://github.com/QubesOS/qubes-issues/issues/2132
[dispvm-ticket]: https://github.com/QubesOS/qubes-issues/issues/2253
[qrexec-proxy]: https://github.com/QubesOS/qubes-issues/issues/1854
[qrexec-policy-keywords]: https://github.com/QubesOS/qubes-issues/issues/865
[qrexec-confirm]: https://github.com/QubesOS/qubes-issues/issues/910
[qrexec-doc]: https://www.qubes-os.org/doc/qrexec3/#extra-keywords-available-in-qubes-40-and-later
[vm-interface]: https://www.qubes-os.org/doc/vm-interface/
[admin-api]: https://www.qubes-os.org/news/2017/06/27/qubes-admin-api/
[qsb-24]: https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-024-2016.txt
[qsb-37]: https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-037-2018.txt
[backup-format]: https://www.qubes-os.org/doc/backup-emergency-restore-v4/
[api-doc]: https://dev.qubes-os.org/projects/qubes-core-admin/en/latest/
