While most of your Gtk and Qt based apps are working with scim, you may experience some issues with pure X apps and apps which only understand XIM (such as Openoffice/OO 1,2).

If you can not input in XIM, first check whether you are using a supported locale by following instructions in System configuration.

Then verify XMODIFIER is set globally by:

export | grep XMODIFIER | grep "@im=SCIM" | wc -l

the output should be 1. If not, please consult System configuration for how to export this variable correctly.

If XMODIFIER is set correctly, then the output of this command

ps aux | grep "scim-launcher.*-f x11" | grep -v grep | wc -l

should be greater than or equal to 1. Otherwise, scim XIM support module is not loaded. You can load it manually as follows:

scim -d -c socket -f x11 -e socket

Generally,

scim -d

should automatically invoke that module. If it does not, you'd better looking into what your distro used to start scim by default.