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108 lines
6.3 KiB
Markdown
108 lines
6.3 KiB
Markdown
---
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lang: en
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layout: doc
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permalink: /doc/releases/4.0/release-notes/
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ref: 23
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title: 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](https://dev.qubes-os.org/projects/qubes-core-admin/en/latest/)
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* [Admin API](/news/2017/06/27/qubes-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](https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-037-2018.txt) and [HVM](https://github.com/QubesOS/qubes-issues/issues/2185) by default to [mitigate Meltdown & Spectre](https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-037-2018.txt) and lower the [attack surface on Xen](https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-024-2016.txt)
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* Create USB VM by default
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* [Multiple DisposableVMs templates support](https://github.com/QubesOS/qubes-issues/issues/2253)
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* New [backup format](/doc/backup-emergency-restore-v4/) using scrypt key-derivation function
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* Non-encrypted backups no longer supported
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* [split VM packages](https://github.com/QubesOS/qubes-issues/issues/2771), for better support minimal, specialized templates
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* [Qubes Manager decomposition](https://github.com/QubesOS/qubes-issues/issues/2132) - domains and devices widgets instead of full Qubes Manager; devices widget support also USB
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* [More flexible firewall interface](/doc/vm-interface/) for ease unikernel integration
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* Template VMs do not have network interface by default, [qrexec-based updates proxy](https://github.com/QubesOS/qubes-issues/issues/1854) is used instead
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* More flexible IP addressing for VMs - [custom IP](https://github.com/QubesOS/qubes-issues/issues/1477), [hidden from the IP](https://github.com/QubesOS/qubes-issues/issues/1143)
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* More flexible Qubes RPC policy - [related ticket](https://github.com/QubesOS/qubes-issues/issues/865), [documentation](/doc/qrexec/#specifying-vms-tags-types-targets-etc)
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* [New Qubes RPC confirmation window](https://github.com/QubesOS/qubes-issues/issues/910), including option to specify destination VM
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* [New storage subsystem design](https://github.com/QubesOS/qubes-issues/issues/1842)
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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](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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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](https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-037-2018.txt)).
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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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* The following steps may need to be applied in dom0 and Fedora 26 TemplateVMs in order to receive updates (see [#3737](https://github.com/QubesOS/qubes-issues/issues/3737)).
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Steps for dom0 updates:
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1. Open the Qubes Menu by clicking on the "Q" icon in the top-left corner of the screen.
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2. Select `Terminal Emulator`.
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3. In the window that opens, enter this command:
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```
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sudo nano /etc/yum.repos.d/qubes-dom0.repo
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```
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4. This opens the nano text editor. Change all four instances of `http` to `https`.
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5. Press `CTRL+X`, then `Y`, then `ENTER` to save changes and exit.
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6. Check for updates normally.
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Steps for Fedora 26 TemplateVM updates:
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1. Open the Qubes Menu by clicking on the "Q" icon in the top-left corner of the screen.
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2. Select `Template: fedora-26`, then `fedora-26: Terminal`.
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3. In the window that opens, enter the command for your version:
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```
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[Qubes 3.2] sudo gedit /etc/yum.repos.d/qubes-r3.repo
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[Qubes 4.0] sudo gedit /etc/yum.repos.d/qubes-r4.repo
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```
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4. This opens the gedit text editor in a window. Change all four instances of `http` to `https`.
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5. Click the "Save" button in the top-right corner of the window.
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6. Close the window.
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7. Check for updates normally.
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8. Shut down the TemplateVM.
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Known issues
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------------
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* Locale using coma as decimal separator [crashes qubesd](https://github.com/QubesOS/qubes-issues/issues/3753). 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](https://github.com/QubesOS/qubes-issues/issues/3352). 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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* With R4.0.1, which ships kernel-4.19, you may never reach the anaconda startup and be block on an idle black screen with blinking cursor. You can try to add `plymouth.ignore-serial-consoles` in the grub installer boot menu right after `quiet rhgb`. With legacy mode, you can do it directly when booting the DVD or USB key. In UEFI mode, follow the same procedure described for [disabling](/doc/uefi-troubleshooting/#installation-freezes-before-displaying-installer) `nouveau` module (related [solved issue](https://github.com/QubesOS/qubes-issues/issues/3849) in further version of Qubes).
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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](/doc/backup-restore/) for migrating of all of the user VMs.
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We also provide [detailed instruction](/doc/upgrade-to-r4.0/) for this procedure.
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