Korean Keyboard setting for "Shift+Space" on Windows.

HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > services > i8042prt > parameters
LayerDriver KOR : REG_SZ : kbd101c.dll <= default was kbd101a.dll

Korean Keyboard setting for "Shift+Space" on Ubuntu.

[UIM]
$ sudo apt-get install uim uim-byeoru
$ im-switch # choose uim-systray