[My SOLUTION]
in my lubuntu 14.04 same problem. Googling I found 100%cpu utilisation is due to the two processes: ibus-daemon and ibus-x11
1st SOLUTION: start menu > Preferences > Language Support > Keyboard Input Method System: none
2n alternate SOLUTION: sudo apt-get remove ibus
NOTE:
IBUS is an "alternative" to setxkbmap
IBUS has many problem with some keyboard under lubuntu 14.04
see also (ibus daemon cpu use flares up briefly when editing in Gedit) at https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1299759
[My SOLUTION]
in my lubuntu 14.04 same problem. Googling I found 100%cpu utilisation is due to the two processes: ibus-daemon and ibus-x11
1st SOLUTION: start menu > Preferences > Language Support > Keyboard Input Method System: none
2n alternate SOLUTION: sudo apt-get remove ibus
NOTE: /bugs.launchpad .net/ubuntu/ +source/ ibus/+bug/ 1299759
IBUS is an "alternative" to setxkbmap
IBUS has many problem with some keyboard under lubuntu 14.04
see also (ibus daemon cpu use flares up briefly when editing in Gedit) at https:/