Disable Default Ctrl+Shift+U Shortcut on Ubuntu

Ubuntu systems that use the IBus input method (IM) framework assign the Ctrl+Shift+U keyboard combination to Unicode character entry by default. After pressing the shortcut, an underlined u appears, allowing a Unicode code point (entered in hexadecimal format) to be converted into the corresponding character. This default behavior can interfere with applications that rely on the same key combination. For example, Ctrl+Shift+U is used in JetBrains IDEs to toggle the case of selected text or the word located at the cursor position. This tutorial explains how to disable default Ctrl+Shift+U shortcut on Ubuntu.

The IBus configuration can be modified with the gsettings utility. Execute the following command to remove the default Unicode input shortcut:

gsettings set org.freedesktop.ibus.panel.emoji unicode-hotkey '@as []'

In this command:

• org.freedesktop.ibus.panel.emoji - specifies the IBus settings schema that contains emoji and Unicode input preferences.
• unicode-hotkey - configuration option responsible for the Unicode code point shortcut.
• '@as []' - assigns an empty array, effectively disabling the key binding.

After applying the change, the Ctrl+Shift+U shortcut is no longer captured by IBus and can be used by other applications without triggering Unicode input mode.