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When I press Ctrl+Shift+U and type numbers, nothing happens. Holding down control or shift doesn't help, either. I've tried running sudo dpkg-reconfigure keyboard-configuration, but that didn't solve the problem. Can anyone offer some help?

3

The reason why entering Ctrl+Shift+u,Unicode hexa number,Enter or Space stop working in Ubuntu 15.10+ is because input method is by default XIM instead of iBus (which is odd since XIM is obsolete and iBus already implement XIM protocol). While changing this they brake this useful shortcut.

To fix it go to :

  1. GNOME Shell: Settings → Region & Language → Manage Installed Languages

    On Unity: System Settings... → Language Support

  2. Keyboard input method system, change it to iBus. screenshot
  3. Restart

Reference

2

It hasn't stopped working in general, but the way it works may have led you to think that it has stopped working. When one types Ctrl+Shift+u an underscored letter u appears at the insertion point. This may lead a person (e.g., myself, at first) to think that he has entered an underscored letter u, whereas in fact the underscored letter u indicates the Unicode-entry mode has been activated. If one subsequently keys in a Unicode code point (i.e., the hexadecimal numeral for the character) and hits Enter then the unicode character will appear.

For example, Ctrl+Shift+u 2764Enter inserts a "heavy black heart" Unicode character.

Demonstration: ❤

  • 1
    The underlined U does not appear. – EMBLEM Jan 5 '15 at 5:31
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    It stopped working for me too, must be some issue with GTK – MightyPork May 2 '15 at 17:35
  • Just tested in gedit in Ubuntu 15.04. Worked fine. – jdthood May 3 '15 at 19:25
  • It doesn't work for me on Ubuntu 14.04. It used to work on earlier versions of Ubuntu. – pts Oct 10 '17 at 21:54

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