Hi everyone, after a discussion in a team and with Fedora QE we have
decided to postpone this change to Fedora 42.
We have the code nearly ready, however, we have already missed the
testable deadline and are approaching the 100% Code Completion deadline.
We want to ensure sufficient time for proper testing rather than rushing
the feature into Fedora. To avoid burdening the teams during the Fedora
41 branching, we've decided to push this code to Rawhide only and delay
the change until Fedora 42. Ideally, we would also like to organize a
proper test day on Rawhide.
Best Regards,
Jirka
On 31. 05. 24 10:34, Aoife Moloney wrote:
Wiki - https://fedoraproject.org/wiki/Changes/Anaconda_As_Native_Wayland_Application
Discussion Thread -
https://discussion.fedoraproject.org/t/f41-change-proposal-anaconda-as-native-wayland-application-system-wide/118550
This is a proposed Change for Fedora Linux.
This document represents a proposed Change. As part of the Changes
process, proposals are publicly announced in order to receive
community feedback. This proposal will only be implemented if approved
by the Fedora Engineering Steering Committee.
== Summary ==
Currently, Anaconda is still an X11 application, which we would like
to fix and make Anaconda Wayland native application to allow us drop
of the X11 dependencies from installation ISO images. However, this
change is not just a simple switch and we need to do some adjustments
during the path which will impact user experience.
== Owner ==
* Name: Anaconda team ([[User:jkonecny| Jiří Konečný]])
* Email: jkonecny@xxxxxxxxxx
== Detailed Description ==
Anaconda is required to migrate to Wayland native application to drop
dependencies from the installation ISO images which are deprecated.
Package owners want to drop libXklavier from Fedora (see
https://bugzilla.redhat.com/show_bug.cgi?id=1955025 ) but also Xorg
server from CentOS Stream and RHEL. However, this change won’t be just
simple switching from X11 to Wayland, we also need to change a few
things in Anaconda to be able to remove the X11 dependencies. This
will have two main visible impacts listed below.
=== VNC switch to RDP for remote GUI installations ===
Anaconda has to remove ‘TigerVNC' which is used for VNC connection to
be able to install your machine remotely with graphical UI. Reason is
that TigerVNC is built from the Xorg server sources, so we would still
depend on the Xorg server with this project. As replacement, we follow
the recommendation of the Fedora Workstation to switch to Gnome Remote
Desktop (grd) with a better protocol Remote Desktop Protocol (RDP)
which gives users better performance and security.
This will have an impact on current vnc kickstart commands and kernel
boot options of Anaconda. This will impact only the Anaconda
installation environment (boot.iso).
=== Consistent keyboard control ===
Currently, Anaconda experiences difficulties in handling keyboard
layouts in the installation environment, particularly on Wayland.
Formerly, libXklavier was utilized by Anaconda to manage keyboard
layout configuration, however, it proved unstable on Wayland. As a
result, Anaconda has disabled keyboard handling during Wayland Live
media installations due to unexpected behavior (refer to
https://bugzilla.redhat.com/show_bug.cgi?id=2016613 ). This approach
may lead to situations when users encountering issues while unlocking
LUKS devices or using user passwords in the installed system because
installation was done with a different keyboard layout.
To exacerbate the situation, there is no universally applicable
solution for keyboard handling on Wayland systems, as Wayland lacks a
unified API for keyboard management. It means that each Fedora Desktop
Environment developed their own API. Unfortunately, the Anaconda team
is not able to maintain a custom solution for each Fedora spin. Some
Desktop environments started to use '''systemd-localed''' DBus API to
address this issue and similar issues. The systemd-localed API seems
to be the best approach currently, so we want to promote it as a
shared solution for all Fedora spins.
The plan is:
* All Fedora spins and Anaconda listen on
'''org.freedesktop.locale1''' and reflect configuration on the
currently running system (might be only for Live media if desired)
* All Fedora spins and Anaconda reflect their configuration to
org.freedesktop.locale1
* In case Fedora spin will not support '''org.freedesktop.locale1''',
the keyboard configuration of Anaconda won’t be reflected in the
current system and the situation will be similar to the current Live
Wayland experience
All the spin owners were notified about this request:
* https://pagure.io/fedora-workstation/issue/430
* https://pagure.io/fedora-kde/SIG/issue/504
* https://gitlab.com/fedora/sigs/sway/SIG/-/issues/36
* https://bugzilla.redhat.com/show_bug.cgi?id=2278655
* https://bugzilla.redhat.com/show_bug.cgi?id=2278658
* https://bugzilla.redhat.com/show_bug.cgi?id=2278656
* https://bugzilla.redhat.com/show_bug.cgi?id=2278864
* https://bugzilla.redhat.com/show_bug.cgi?id=2278866
* https://bugzilla.redhat.com/show_bug.cgi?id=2278869
* https://bugzilla.redhat.com/show_bug.cgi?id=2278874
* https://pagure.io/fedora-cosmic/SIG/issue/1
* https://pagure.io/fedora-budgie/project/issue/4
* https://pagure.io/fedora-lxqt/SIG/issue/4
* https://pagure.io/i3-sig/Fedora-i3-Spin/issue/70
== Feedback ==
We have some feedback from the SIG owners for the keyboard handling
(see the links above).
We don’t have feedback for the VNC to RDP switch yet.
== Benefit to Fedora ==
* This change will enable removal of X11 dependencies from the
Anaconda which may result in reduction of installed software to the
system when installing from Live ISO where ISO content is copied to
the installed system (depends on the spin dependencies).
* Switching from VNC to RDP allow users to use remote graphical
installations which are more secure and have better performance .
== Scope ==
* Proposal owners: The Anaconda team will implement changes required
in the Anaconda project. More specifically:
** Switch Anaconda code to start Wayland environment on boot.iso instead of X11
** Change keyboard switching logic to use systemd-localed DBus instead
of libXklavier
** Switch remote graphical installations from VNC (TigerVNC) to RDP (GRD)
* Other developers: Fedora SIG owners needs to add support for their
environment to listen and use systemd-localed DBus API to reflect
current state of the DE/WM or they won’t have support of keyboard
layout switching in Anaconda.
* Release engineering: [https://pagure.io/releng/issue/12138 #12138]
* Policies and guidelines: Yes should be done after the implementation
(https://docs.fedoraproject.org/en-US/fedora-server/installation/interactive-remote
should switch to RDP)
* Trademark approval: N/A (not needed for this Change)
* Alignment with the Fedora Strategy:
== Upgrade/compatibility impact ==
This will impact only Fedora installations so no compatibility or
upgrade issues.
== Early Testing (Optional) ==
We will reach Fedora QE to coordinate testing approach.
== How To Test ==
# Download any installation media
# Run the installation
# Look for breakages during the installation
Testing should be especially focused on:
* Changing resolution with ''inst.resolution'' kernel boot option
* Test new RDP solution (API will be clarified)
** Password can be set to the RDP
** Username can be set to the RDP
* Test keyboard layout switching works correctly
** On Live media, Anaconda should react on keyboard layout change in
the DE and set that to the installed system
** On Live media, Anaconda should be able to set the keyboard layout
changes to the live environment
** In the network installation (boot.iso) Anaconda should correctly
reflect keyboard layouts changes so text in the Anaconda is written by
the correct layout
** Check if specific keyboard layouts are configured and installed as expected
== User Experience ==
The only visible change to a user should be:
* Remote graphical installations will use RDP instead of VNC.
* Anaconda will be able to control keyboard layouts in the Wayland
environment on Live ISOs. This will improve user experience when
installing Fedora Workstation, Fedora KDE, Fedora Sway and other
Wayland based environments.
== Dependencies ==
No dependencies of this package related to this change.
== Contingency Plan ==
* Contingency mechanism: Postpone this change to the next Fedora
release. Revert landed changes in Anaconda if required.
* Contingency deadline: 100% code completion deadline
* Blocks release? No
== Documentation ==
No documentation yet. However, there are a few PRs ready for merge for
CentOS Stream 10:
* https://github.com/rhinstaller/anaconda/pull/5463
* https://github.com/rhinstaller/anaconda/pull/5470
* https://github.com/rhinstaller/anaconda/pull/5485
* https://github.com/rhinstaller/anaconda/pull/5498
== Release Notes ==
TBD
--
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