Install scim

安装中文支持，装完后就有scim了：
System -> Administation -> Language Support -> check Chinese

不过还要把scim设置成默认启动的输入法：

sudo cp /etc/X11/xinit/xinput.d/default /etc/X11/xinit/xinput.d/default.bak
sudo cp /etc/X11/xinit/xinput.d/scim /etc/X11/xinit/xinput.d/default

restart X (Ctrl + Alt + Backspace)

解决光标不能跟随的问题：
System -> Preference -> SCIM Input Method Setup -> Panel -> GTK, uncheck 'Embedded lookup table'
System -> Preference -> SCIM Input Method Setup -> Frontend -> Global Setup, uncheck 'Embed Preedit String into client window'

Then restart scim：

pkill scim
scim -d