This problem exists since openSUSE 13.2, and it continues to exist in
Tumbleweed and Leap.

THw whole bunch of ibus-table-* input methods can be installed and added in
iBus. However, when those input methods are selected, iBus failed to utilize
them, iBus stays at the input method that is currently using, instead of
changing into the one that I just selected.

Similar problem had occured in openSUSE 13.1, which ibus-table input methods
even couldn't be added to iBus (packages installed but iBus did not list them
out). There was a solution for this situation, but this time that solution does
not work for what happens in openSUSE 13.2/Tumbleweed/Leap.