之前遇到了这个问题，终于在今天看到了一篇文章完美解决了。

确保系统已经安装ibus，如无，则安装$sudo apt-get install ibus ibus-qt4 ibus-gtk
按下面的文件来修改配置文件$sudo vim /etc/X11/xinit/xinput.d/default

#
# This configuration provides default IM setting (user edittable)
# See im-switch(8) and /usr/share/doc/im-switch/README.Debian .

#
# Define IM for traditional X application with XIM
#
#  XIM server name used for XMODIFIERS="@im=$XIM"
#  XIM program /path/filename
#  XIM program command line arguments
#
#  These were traditional setting before uim and scim for CJK languages
#  Language   LC_CTYPE     XIM server XMODIFIERS              Start key
#  Japanese   ja_JP*       kinput2    "@im=kinput2"           Shift-Space
#  Korean     ko_KR*       ami        "@im=Ami"               Shift-Space
#  Chinese(T) zh_TW.Big5   xcin       "@im=xcin-zh_TW.big5"   Ctrl-Space
#  Chinese(S) zh_CN.GB2312 xcin       "@im=xcin-zh_CN.GB2312" Ctrl-Space
#
XIM=ibus
XIM_PROGRAM=/usr/bin/ibus-daemon
XIM_ARGS="--xim"
XIM_PROGRAM_XTRA=
# Set following variable to non-zero string if program set itself as deamon
XIM_PROGRAM_SETS_ITSELF_AS_DAEMON=
#
# Define GTK and QT IM module
#   They may or may not be using xim as the IM.
#
GTK_IM_MODULE=ibus
QT_IM_MODULE=ibus

#
# Define lists of packages neded for above IM to function
#
DEPENDS="ibus, ibus-gtk, ibus-qt4"

#
# Define X start up hook script to update IM environment
#

重启系统则OK。

转自这里。