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UEFI firmware can report the currently-active keyboard layout via EFI_HII_DATABASE_PROTOCOL.GetKeyboardLayout(). The layout descriptor includes an RFC 4646 / BCP 47 language tag (e.g. "en-US"). Query this from sd-boot/sd-stub and write it to a new LoaderKeyboardLayout EFI variable, advertised through a new EFI_LOADER_FEATURE_KEYBOARD_LAYOUT feature bit. On the OS side, systemd-vconsole-setup reads the variable as a lowest-priority fallback for the console keymap. To map the BCP 47 tag to a vconsole keymap we extend /usr/share/systemd/kbd-model-map with an optional sixth column listing the comma-separated BCP 47 tags each row covers; a new find_vconsole_keymap_for_bcp47() helper walks the file, preferring an exact tag match and otherwise falling back to the row whose tag matches the input's primary subtag. Credentials, /etc/vconsole.conf, and vconsole.keymap= on the kernel command line continue to take precedence. bootctl status surfaces the new variable, printing the language tag or "n/a (not reported by firmware)" when sd-boot advertises the feature but the firmware HII database didn't expose a layout (common on QEMU without a USB keyboard, since EDK2's PS/2 driver does not register an HII keyboard layout).
124 lines
6.1 KiB
XML
124 lines
6.1 KiB
XML
<?xml version="1.0"?>
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<!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
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<refentry id="systemd-vconsole-setup.service" conditional='ENABLE_VCONSOLE'
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>systemd-vconsole-setup.service</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-vconsole-setup.service</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-vconsole-setup.service</refname>
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<refname>systemd-vconsole-setup</refname>
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<refpurpose>Configure the virtual consoles</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-vconsole-setup.service</filename></para>
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<cmdsynopsis>
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<command>/usr/lib/systemd/systemd-vconsole-setup</command>
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<arg choice="opt">TTY</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>systemd-vconsole-setup</command> sets up and configures either all virtual consoles, or
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— if the optional <replaceable>TTY</replaceable> parameter is provided — a specific one. When the system
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is booting up, <filename>systemd-vconsole-setup.service</filename> is called by
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<citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry> during
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VT console subsystem initialization. Also,
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<citerefentry><refentrytitle>systemd-localed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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invokes it as needed when language or console changes are made.
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Internally, this program calls
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<citerefentry project='mankier'><refentrytitle>loadkeys</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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and
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<citerefentry project='die-net'><refentrytitle>setfont</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
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</para>
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<para>Execute <command>systemctl restart systemd-vconsole-setup.service</command> in order to apply any manual
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changes made to <filename>/etc/vconsole.conf</filename>.</para>
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<para>See <citerefentry><refentrytitle>vconsole.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
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information about the configuration files and kernel command line options understood by this program.</para>
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</refsect1>
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<refsect1>
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<title>Credentials</title>
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<para><command>systemd-vconsole-setup</command> supports the service credentials logic as implemented by
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<varname>ImportCredential=</varname>/<varname>LoadCredential=</varname>/<varname>SetCredential=</varname>
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(see <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
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details). The following credentials are used when passed in:</para>
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<variablelist class='system-credentials'>
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<varlistentry>
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<term><varname>vconsole.keymap</varname></term>
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<term><varname>vconsole.keymap_toggle</varname></term>
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<listitem><para>The keymap (and toggle keymap) to apply. The matching options in
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<filename>vconsole.conf</filename> and on the kernel command line take precedence over these
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credentials.</para>
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<para>Note the relationship to the <varname>firstboot.keymap</varname> credential understood by
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<citerefentry><refentrytitle>systemd-firstboot.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>:
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both ultimately affect the same setting, but <varname>firstboot.keymap</varname> is written into
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<filename>/etc/vconsole.conf</filename> on first boot (if not already configured), and then read from
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there by <command>systemd-vconsole-setup</command>, while <varname>vconsole.keymap</varname> is read
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on every boot, and is not persisted to disk (but any configuration in
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<filename>vconsole.conf</filename> will take precedence if present).</para>
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<xi:include href="version-info.xml" xpointer="v253"/></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>vconsole.font</varname></term>
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<term><varname>vconsole.font_map</varname></term>
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<term><varname>vconsole.font_unimap</varname></term>
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<listitem><para>The console font settings to apply. The matching options in
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<filename>vconsole.conf</filename> and on the kernel command line take precedence over these
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credentials.</para>
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<xi:include href="version-info.xml" xpointer="v253"/></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Firmware-provided keyboard layout</title>
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<para>If the boot loader reports the firmware-configured keyboard layout via the
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<varname>LoaderKeyboardLayout</varname> EFI variable (see the
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<ulink url="https://systemd.io/BOOT_LOADER_INTERFACE">Boot Loader Interface</ulink>),
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<command>systemd-vconsole-setup</command> uses it as the lowest-priority fallback for the
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keymap. The RFC 4646 / BCP 47 language tag reported by the firmware (e.g. <literal>de-DE</literal>) is
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matched against the optional sixth column of <filename>/usr/share/systemd/kbd-model-map</filename>,
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which lists the language tags each virtual-console keymap covers. Credentials,
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<filename>/etc/vconsole.conf</filename>, and kernel command line options all override this
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firmware-provided default.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para><simplelist type="inline">
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<member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
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<member><citerefentry><refentrytitle>vconsole.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry></member>
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<member><citerefentry project='mankier'><refentrytitle>loadkeys</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
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<member><citerefentry project='die-net'><refentrytitle>setfont</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
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<member><citerefentry><refentrytitle>systemd-localed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
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</simplelist></para>
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</refsect1>
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</refentry>
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