IBus icon is missing at startup?

After some installing, tweaking, ... the IBus icon is missing at startup, although it's working fine:

$ ps -ef | grep [i]bus
quanta 1918 1890 0 09:54 ? 00:00:01 /usr/bin/ibus-daemon --xim
quanta 1946 1918 0 09:54 ? 00:00:00 /usr/lib/i386-linux-gnu/ibus/ibus-gconf
quanta 1948 1918 0 09:54 ? 00:00:00 /usr/bin/python /usr/share/ibus/ui/gtk/main.py
quanta 1951 1 0 09:54 ? 00:00:00 /usr/lib/i386-linux-gnu/ibus/ibus-x11 --kill-daemon
quanta 1987 1918 0 09:54 ? 00:00:00 /usr/lib/ibus-unikey/ibus-engine-unikey --ibus

I can make it appear by restarting the ibus-daemon:

$ ibus-daemon -x -r -d

I also have tried to add the IBus to the System tray whitelist but nothing changes.

How can I troubleshoot this issue?

2 Answers

I have switched from Gentoo to Ubuntu. The culprit is: on Gentoo, IBus is started automatically by adding a line like ibus-daemon -x -d into the ~/.bashrc which has appended to the end of the Ubuntu's ~/.bashrc. Problem solved after deleting that line.

Oh, that doesn't solve my problem completely. After restarting one more time, it disappeared again.

Here're the steps that I have done to answer my own question: Who is starting IBus at startup?

Find out the parent of IBus:

$ ps -ef | grep ibu[s]
quanta 1922 1894 0 10:43 ? 00:00:00 /usr/bin/ibus-daemon --xim
quanta 1953 1922 0 10:43 ? 00:00:00 /usr/lib/i386-linux-gnu/ibus/ibus-gconf
quanta 1955 1922 0 10:43 ? 00:00:00 /usr/bin/python /usr/share/ibus/ui/gtk/main.py
quanta 1957 1 0 10:43 ? 00:00:00 /usr/lib/i386-linux-gnu/ibus/ibus-x11 --kill-daemon
quanta 1983 1922 0 10:43 ? 00:00:00 /usr/lib/ibus-unikey/ibus-engine-unikey --ibus

Who has PID 1894:

$ ps -ef | awk '$2 == 1894 {print $0}'
quanta 1894 1563 0 10:43 ? 00:00:00 gnome-session --session=ubuntu

Determine the startup script of IBus:

$ grep -lir ibus /etc/X11/
/etc/X11/xinit/xinput.d/ibus

OK, open it up and change the XIM_ARGS to:

XIM_ARGS="--xim --replace --daemonize"

Restart to see if it works.