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98 lines
4.9 KiB
Markdown
98 lines
4.9 KiB
Markdown
---
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layout: doc
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title: Qubes R4.0 release notes
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permalink: /doc/releases/4.0/release-notes/
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---
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Qubes R4.0 release notes
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========================
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New features since 3.2
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----------------------
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* Core management scripts rewrite with better structure and extensibility, [API documentation][api-doc]
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* [Admin API][admin-api] allowing strictly controlled managing from non-dom0
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* All `qvm-*` command-line tools rewritten, some options have changed
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* Renaming VM directly is prohibited, there is GUI to clone under new name and remove old VM
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* 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]
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* Create USB VM by default
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* [Multiple Disposable VMs templates support][dispvm-ticket]
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* New [backup format][backup-format] using scrypt key-derivation function
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* Non-encrypted backups no longer supported
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* [split VM packages][packages-split], for better support minimal, specialized templates
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* [Qubes Manager decomposition][manager-ticket] - domains and devices widgets instead of full Qubes Manager; devices widget support also USB
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* [More flexible firewall interface][vm-interface] for ease unikernel integration
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* Template VMs do not have network interface by default, [qrexec-based updates proxy][qrexec-proxy] is used instead
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* More flexible IP addressing for VMs - [custom IP][custom-ip], [hidden from the IP][hide-ip]
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* More flexible Qubes RPC policy - [related ticket][qrexec-policy-keywords], [documentation][qrexec-doc]
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* [New Qubes RPC confirmation window][qrexec-confirm], including option to specify destination VM
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* [New storage subsystem design][storage]
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* Dom0 update to Fedora 25 for better hardware support
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* Kernel 4.9.x
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You can get detailed description in [completed github issues][github-release-notes]
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Security Notes
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--------------
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* PV VMs migrated from 3.2 to 4.0-rc4 or later are automatically set to PVH mode in order to protect against Meltdown (see [QSB #37][qsb-37]).
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However, PV VMs migrated from any earlier 4.0 release candidate (RC1, RC2, or RC3) are not automatically set to PVH mode.
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These must be set manually.
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Known issues
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------------
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* Locale using coma as decimal separator [crashes qubesd][locale-bug]. Either install with different locale (English (United States) for example), or manually apply fix explained in that issue.
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* In the middle of installation, [keyboard layout reset to US][keyboard-layout-bug]. Be careful what is the current layout while setting default user password (see upper right screen corner).
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* On some laptops (for example Librem 15v2), touchpad do not work directly after installation. Reboot the system to fix the issue.
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* List of USB devices may contain device identifiers instead of name
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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+4.0%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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---------
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See [Qubes Downloads](/downloads/).
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Installation instructions
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-------------------------
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See [Installation Guide](/doc/installation-guide/).
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Upgrading
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---------
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There is no in-place upgrade path from earlier Qubes versions. The only
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supported option to upgrade to Qubes R4.0 is to install it from scratch and use
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[qubes backup and restore tools][backup] for migrating of all of the user VMs.
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We also provide [detailed instruction][upgrade-to-r4.0] for this procedure.
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[backup]: /doc/backup-restore/
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[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
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[custom-ip]: https://github.com/QubesOS/qubes-issues/issues/1477
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[hide-ip]: https://github.com/QubesOS/qubes-issues/issues/1143
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[packages-split]: https://github.com/QubesOS/qubes-issues/issues/2771
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[hvm-switch]: https://github.com/QubesOS/qubes-issues/issues/2185
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[manager-ticket]: https://github.com/QubesOS/qubes-issues/issues/2132
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[dispvm-ticket]: https://github.com/QubesOS/qubes-issues/issues/2253
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[qrexec-proxy]: https://github.com/QubesOS/qubes-issues/issues/1854
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[qrexec-policy-keywords]: https://github.com/QubesOS/qubes-issues/issues/865
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[qrexec-confirm]: https://github.com/QubesOS/qubes-issues/issues/910
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[qrexec-doc]: /doc/qrexec3/#extra-keywords-available-in-qubes-40-and-later
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[storage]: https://github.com/QubesOS/qubes-issues/issues/1842
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[vm-interface]: /doc/vm-interface/
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[admin-api]: /news/2017/06/27/qubes-admin-api/
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[qsb-24]: https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-024-2016.txt
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[qsb-37]: https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-037-2018.txt
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[backup-format]: /doc/backup-emergency-restore-v4/
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[api-doc]: https://dev.qubes-os.org/projects/qubes-core-admin/en/latest/
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[upgrade-to-r4.0]: /doc/upgrade-to-r4.0/
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[locale-bug]: https://github.com/QubesOS/qubes-issues/issues/3753
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[keyboard-layout-bug]: https://github.com/QubesOS/qubes-issues/issues/3352
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