More xkb configuration hints
Minor format update (continuing to update XIM topics)
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|The practical workaround is "'''Don't to use XIM mechanism with the input method'''" or avoid entering non-ASCII characters.||The practical workaround is either "'''Don't to use XIM mechanism with the input method'''" or "'''Avoid entering non-ASCII characters'''".|
Debian wiki keyboard portal. This portal covers all aspects of configuring keyboards on Debian.
- Basic keyboard configuration
- Modern keyboard configuration (input method)
- Multi-language keyboard configuration strategy
Keyboard configuration Tips
- Manual configuration of keyboard
- How to set keyboard layout in initramfs
- How to enable USB keyboard in initramfs
- How to dynamically activate Linux console settings
- How to dynamically activate X Window settings
- How to dynamically manage input source settings from the command line
- How to create a custom keyboard shortcut to select a particular input source
- Keyboard configuration for backspace/delete and terminal type
See "The keyboard input" in debian-reference, too.
Basic keyboard configuration
The keyboard settings are stored in /etc/default/keyboard file provided by the keyboard-configuration package. Other packages use this to configure both the Linux kernel and the X Window system to realize consistent keyboard experiences under the Linux console and the X Window system.
You can change your keyboard settings using:
# dpkg-reconfigure keyboard-configuration # service keyboard-setup restart
As usual, it will prompt you for the model of keyboard (what the keyboard *is*), and then for the keyboard layout (what the keys should *do*). Use this tool to change your keyboard map, e. g. from QWERTY to QWERTZ or to Dvorak, or for non-English layouts.
To apply new settings, restarting the keyboard-setup service should suffice, otherwise you can try to restart kernel input system via udev:
# udevadm trigger --subsystem-match=input --action=change
or reboot the whole OS.
Modern keyboard configuration (input method)
The simple keyboard input mechanism realized by the above configuration can't support some languages, such as Chinese and Japanese, properly.
When any of the input method framework packages are installed and activated, the X Window based keyboard configuration settings are ignored for programs based on GTK or QT library. This is because keyboard inputs are passed directly to the application software via GTK or QT library without going through X Input method (XIM).
For GNOME system (the default Debian Desktop environment), ibus package is automatically installed and activated. The keyboard input needs to be configured from its GUI Settings -> Keyboard for basic configurations. For more complicated configuration such as swapping CapsLock and Ctrl, you need to install gnome-tweak and use it.
For non-GNOME system, the stand alone GUI configuration command ibus-setup can set up the input methods for ibus. Under those desktop environments, menu entry of their keyboard configuration utility or pop-up menu entry offered by clicking the associated tray icon may start ibus-setup for you. For KDE, this menu is System_settings -> Hardware -> Input_devices/keyboard.
Multi-language keyboard configuration strategy
People who wish to set up a single keyboard input environment for multiple (European) languages without the input method framework should consider following configuration strategy.
If the input method package is installed, deactivate it by executing im-config -n none.
- Select the correct keyboard model. (US/ISO)
Select the desirable keyboard layout. E.g., English (US International ?AltGr Unicode combining,alternative)
People who wish to set up multiple dynamically-switchable keyboard input environments for multiple languages should consider following configuration strategy.
Install input method framework package such as ibus
(optional) Install pertinent input method engine package such as ibus-anthy
Activate desirable input engine/keyboard layout by adding it from menu such as Settings -> Keyboard -> Input Sources and configure them.
Switch among input methods with by pressing GUI-SPACE.
Please note that the input method framework such as ibus provides its internal functionality equivalent of X keyboard Extension (XKB) to enter many Unicode characters for European languages without additional engine packages and its configuration is availableby GNOME Tweaks with Keyboard & Mouse -> Additional Layout Options. See below for the non-GUI method to set these.
Keyboard configuration Tips
Manual configuration of keyboard
You can edit /etc/default/keyboard manually instead of running dpkg-reconfigure keyboard-configuration.
Here's an example:
# KEYBOARD CONFIGURATION FILE # Consult the keyboard(5) and xkeyboard-config(7) manual page. XKBMODEL="pc105" XKBLAYOUT="us,de,fr,ua,ru" XKBVARIANT="" XKBOPTIONS="grp:alt_shift_toggle" BACKSPACE="guess"
XKBMODEL is a keyboard model variable (look at a /usr/share/X11/xkb/rules/base.lst (plain text) or /usr/share/X11/xkb/rules/base.xml (XML) for a full list);
- XKBLAYOUT variable contains a list of used layouts;
"grp:alt_shift_toggle" sets a layout switching key combination (<Alt>+<Shift>).
Under the X environment, this keyboard layout setting in /etc/default/keyboard can be overridden by executing something like "setxkbmap us,ru -option grp:ctrl_shift_toggle" in the X startup configuration file ~/.xsessionrc . Please note that this is effective only for the X environment and the modern GUI environment may not be running under X environment.
How to set keyboard layout in initramfs
The appropriate section of /etc/initramfs-tools/initramfs.conf needs to be changed to have a localized keyboard layout at boot time:
# # KEYMAP: [ y | n ] # # Load a keymap during the initramfs stage. # KEYMAP=y
# update-initramfs -u
How to enable USB keyboard in initramfs
The initramfs-tools must include the usbhid module and its dependencies for USB keyboard support at boot time. Either the configuration file /etc/initramfs-tools/conf.d/driver-policy must include most modules, or they will have to be specified in another file:
# # MODULES: [ most | netboot | dep | list ] # # most - Add most filesystem and all harddrive drivers. # # dep - Try and guess which modules to load. # # netboot - Add the base modules, network modules, but skip block devices. # # list - Only include modules from the 'additional modules' list # MODULES=most
If the configuration above was not set to include most modules, then the necessary modules have to be specified in the file /etc/initramfs-tools/modules:
# USB keyboard at boot usbcore uhci_hcd ehci_hcd usbhid
# update-initramfs -u
How to dynamically activate Linux console settings
In order to activate changed settings in /etc/default/keyboard without reboot, run setupcon(1).
How to dynamically activate X Window settings
If the input method framework is not active, you can switch the keyboard layout of X Window system from the terminal, e. g.:
$ setxkbmap de $ setxkbmap fr $ setxkbmap us
Of special interest for keyboard hardware with us layout might be the altgr-intl variant (this provides a simple AltGr mapping for many umlauts and special symbols):
$ setxkbmap -rules evdev -model evdev -layout us -variant altgr-intl
$ setxkbmap -model pc105 -layout us -variant altgr-intl
To configure a simple key for toggling between multiple configured keyboard layouts, see Option XkbOptions in Section InputClass somewhere within the xorg config file collection (see [SOLVED] Setxkbmap .xinitrc).
How to dynamically manage input source settings from the command line
GNOME settings can be dynamically managed using gsettings or dconf commands from the command line. (gsettings is the platform independent wrapper of Linux specific dconf)
The current input source setting and the current XKB input source can be obtained from the command line. For example:
$ gsettings get org.gnome.desktop.input-sources sources [('xkb', 'us'), ('ibus', 'anthy'), ('ibus', 'mozc-jp')] $ gsettings get org.gnome.desktop.input-sources xkb-options ['lv3:ralt_switch', 'compose:rwin']
$ dconf read /org/gnome/desktop/input-sources/sources [('xkb', 'us'), ('ibus', 'anthy'), ('ibus', 'mozc-jp')] $ dconf read /org/gnome/desktop/input-sources/xkb-options ['lv3:ralt_switch', 'compose:rwin']
These can be updated to a certain values. For example:
$ gsettings set org.gnome.desktop.input-sources sources "[('xkb', 'us'), ('ibus', 'anthy'), ('ibus', 'mozc-jp')]" $ gsettings set org.gnome.desktop.input-sources xkb-options "['lv3:ralt_switch', 'compose:rwin']"
$ dconf write /org/gnome/desktop/input-sources/sources "[('xkb', 'us'), ('ibus', 'anthy'), ('ibus', 'mozc-jp')]" $ dconf write /org/gnome/desktop/input-sources/xkb-options "['lv3:ralt_switch', 'compose:rwin']"
These can be reset by using gsettings reset ... or dconf reset ....
How to create a custom keyboard shortcut to select a particular input source
For GNOME, you can create a custom keyboard shortcut to select a particular input source deterministically by assigning command to Settings -> Keyboard -> Keyboard Shortcuts (instead of using Super-SPACE toggle). E.g. As explained elsewhare, the following command will select the first input source:
gdbus call --session --dest org.gnome.Shell --object-path /org/gnome/Shell --method org.gnome.Shell.Eval "imports.ui.status.keyboard.getInputSourceManager().inputSources.activate()"
Keyboard configuration for backspace/delete and terminal type
The good review of the complicated situation over the keyboard configuration for backspace/delete and terminal type is available in /usr/share/doc/xterm/README.Debian.
Debian default keymap for xterm is DEC VT 220 like terminal behavior which is consistent with the Linux virtual console. This frees CTRL-H from backspace action and allows us to use CTRL-H for other purposes in programs such as Vim.
kitty terminal and input method
GPU based terminal emulator kitty doesn't use X, GTK, nor QT library. In order to activate input method to enter some characters for Chinese or Japanese, you need to follow /usr/share/doc/kitty/README.Debian.
Input method and XIM
Input method framework: Activated
When input method framework such as ibus is installed and activated, pure X application programs (XIM clients which get keyboard inputs from XIM mechanism) such as xterm and rxvt-unicode don't talk to the X server directly. The input method framework such as ibus handles actual keyboard inputs and pass processed data to XIM clients, instead.
Unfortunately, the combination of ibus and XIM clients is buggy for some non-ASCII character inputs.
There have been frequent and persistent bugs around this combination as discussed in Red Hat Bugzilla – Bug 2013610.
The practical workaround is either "Don't to use XIM mechanism with the input method" or "Avoid entering non-ASCII characters".
Properly configured GTK and QT programs with im-config don't use XIM mechanism and are immune to these annoying bugs of XIM. (If you see GTK_IM_MODULE=xim or QT_IM_MODULE=xim, you are in trouble.)
For terminal emulators, please use any modern ones which can get keyboard inputs via GTK or QT:
For programs such as gitk, please consider to avoid typing non-ASCII characters as the workaround.
Input method framework: Disabled
If you don't need modern functionality of the input method framework such as ibus, you can make XIM clients talk directly to the X server configured with X keyboard Extension (XKB) by disabling ibus as:,
$ im-config -n none
Very old GNOME (currently not an issue @2022)
The keyboard layout was changed on Settings -> Region & Languages -> Input Sources. For releases older than Stretch (initially released @2018), these layouts include minority languages and dialects, as well as very specific configurations, and were hidden by default in the GUI for Stretch (during its testng?).
One can set it via CLI using dconf/gsettings by adding keys to /org/gnome/desktop/input-sources/sources.
The only way to make them visible is to enable the corresponding setting in gconf:
$ gsettings set org.gnome.desktop.input-sources show-all-sources true
For more information on this issue see https://bugzilla.gnome.org/show_bug.cgi?id=682240.