Anyone knows how to disable ctrl+shift+u unicode input?
Whenever I press ctrl+shift+u, I get an underlined "u" and can enter some unicode number. However, I don't need it, and because of this, for example in qt creator the predefined "ctrl+shift+u" keyboard shortcut doesn't work.
I have no idea where this mapping comes from (obviously not qt, since ctrl+shift+u is mapped to an important shortcut), but maybe gnome or the xserver?
That depends on the terminal emulator you are using I think, you might wanna look there.
@Jellicent: No, it doesn't depend on the program. This happens in *every* application (firefox, qt programs, terminals, xterm, tk programs, gtk programs, ...).
@VCoolio: Changing the locale to ISO doesn't help. I'm going to check the GTK_IM_MODULE...
Didn't manage. I guess I'll have to live without the ctrl+shift+u shortcut
I just updated from Ubuntu 13.10 to Ubuntu 14.04 and I found that I have exactly this same problem, which is being caused by ibus (my up to date Arch system doesn't seem to have the problem). You can see if ibus is running on your system via:
$ ps aux | grep -i ibus
peniwize 3108 0.0 0.2 47180 3620 ? Ssl Jun09 1:44 /usr/bin/ibus-daemon --daemonize --xim
peniwize 3127 0.0 0.0 37268 264 ? Sl Jun09 0:00 /usr/lib/ibus/ibus-dconf
peniwize 3129 0.0 0.7 181000 13040 ? Sl Jun09 0:34 /usr/lib/ibus/ibus-ui-gtk3
peniwize 3147 0.0 0.2 40224 3984 ? Sl Jun09 0:00 /usr/lib/ibus/ibus-x11 --kill-daemon
peniwize 3179 0.0 0.0 27956 1096 ? Sl Jun09 0:10 /usr/lib/ibus/ibus-engine-simple
I'm running XFCE and there is now a "Language Support" icon in the "Settings" panel (select "Settings Manager" on the main menu.) The Language Support app contains a "Keyboard input method system" selection on Language tab. I changed it from 'IBus' to 'None' and now Ctrl+Shift+u works again. (This is a quick and dirty solution that works for me because I'm only using English and never have to type special characters.)
I figured out that killing ibus-daemon process removes the stubborn keybinding.