Refer to these two posts:
1. 安裝繁體中文支援套件
2. 安裝 bopomofo 繁體中文輸入法
Note: Besides bopomofo, you may choose other input methods, too.
Refer to Picture 2.

I've done the above two already. The problem remains. I think it doesn't start with X-windows, because every time when I start ibus-setup, the system always warns me that "the ibus daemon is not running, do you want to activate it?" So here is new question, how to have ibus daemon started with booting or login?

I think I've found out why but not how. When I tried to type some Chinese, instead of using XIM but IBUS, I succeeded. However, I don't know how to set the default from XIM to IBUS, and have IBUS started automatically.

I don't know how to set the default from XIM to IBUS

from the terminal
im-switch # than choose default ibus from the menu
or
im-switch -z all_ALL -s ibus # no menu
logout then login

the system always warns me that "the ibus daemon is not running, do you want to activate it?"

try
sudo ibus-setup # this for root user
choose yes when asked

then
ibus-setup # this for user
choose yes when asked

poloshiao 寫到：

I don't know how to set the default from XIM to IBUS

from the terminal
im-switch # than choose default ibus from the menu
or
im-switch -z all_ALL -s ibus # no menu
logout then login

the system always warns me that "the ibus daemon is not running, do you want to activate it?"

try
sudo ibus-setup # this for root user
choose yes when asked

then
ibus-setup # this for user
choose yes when asked

Those above are working. However, the ibus daemon still doesn't start automatically at reboot or after login. I have to do it manually.

1. IBus daemon is not started. Do you want to start it now? but never start.
Reading the following comments on the bottom of the above post.

2. IBus daemon is not started. Do you want to start it now? but never start.

3. These steps are not necessary in Ubuntu 11.10.
Maybe your versions of ibus or others are not updated.
try
sudo apt-get update
sudo apt-get upgrade
then
ibus-setup
im-switch
logout then login

By the way, what version is your ubuntu ?
11.10 ?

poloshiao 寫到：
1. IBus daemon is not started. Do you want to start it now? but never start.
Reading the following comments on the bottom of the above post.

2. IBus daemon is not started. Do you want to start it now? but never start.

I don't have the same file in the exactly same directory.

Another question pops up. Even though I had removed the gcin and SCIM those still show up in the menu of input method menu in the language selector. Is that right?

3. These steps are not necessary in Ubuntu 11.10.
Maybe your versions of ibus or others are not updated.
try
sudo apt-get update
sudo apt-get upgrade
then
ibus-setup
im-switch
logout then login

Done. But not works

By the way, what version is your ubuntu ?
11.10 ?

Not wrong, 11.10

Even though I start the ibus-daemon and the icon and the language bar show up. I still can't type Chinese. It just doesn't listen to the keyboard.

Even though I had removed the gcin and SCIM those still show up in the menu of input method menu in the language selector. Is that right?

That is not the key factor, but the problem maybe come from im-switch out-of-control.
you may read this file:
/usr/share/doc/im-switch/README.Debian.gz
unzip it to
/usr/share/doc/im-switch/README.Debian
and then
cat /usr/share/doc/im-switch/README.Debian
or
sudo cat /usr/share/doc/im-switch/README.Debian
you can understand the mechanism of im-switch in details
you may learn how to remove gcin and SCIM from the menu in the reading above.

The simple way may be to purge im-switch package
purge all packages beginned with gcin
purge all packages beginned with SCIM
install ibus ( or all packages beginned with ibus)
then
install im-switch once again
im-switch
ibus-setup
logout and then login

I don't have the same file in the exactly same directory.

So always pay attention on the version of Ubuntu or ibus or im-switch
while you are reading the posts.
Sometimes different versions mean somethings may have been changed.
The files like
/usr/share/doc/im-switch/README.Debian.gz
in your machine are usually supposed to be updated.
So try to find out something new in the directory /usr/share/doc/im-switch related to im-switch.

I don't have the same file in the exactly same directory.

Post out the file name so that some help may be given from all friends who has read this post.

Two errors appeared now. By the steps given in the README, I tried some instructions from inside.
$ sudo im-switch -s default
[sudo] password for owen:
update-alternatives: error: alternative /etc/X11/xinit/xinput.d/default for xinput-zh_TW not registered, not setting.

$ sudo im-switch -z all_ALL -s ibus
update-alternatives: error: alternative /etc/X11/xinit/xinput.d/ibus for xinput-all_ALL not registered, not setting.

What's wrong?

from the terminal
1. sudo ls -al /etc/X11/xinit/xinput.d
copy all the outputs and post here

2. sudo locale
copy all the outputs and post here