To use xvnkb in X-Windows environment, you should add these lines to your
.xinitrc:

# use xim module of gtk
export GTK_IM_MODULE=xim
# change locale to UTF-8, for example en_US.UTF-8
export LANG=en_US.UTF-8 
# preload xvnkb core module 
export LD_PRELOAD=/usr/local/lib/xvnkb.so.0.2.8

-- Nguyen Tam Chinh
chinhngt@sectorb.msk.ru