Basically what the title says. I'm using ibus for the keyboard layout and have ibus-hangul (re-)installed. Everything worked fine until I upgraded to Ubuntu 14.10. I can still switch to Korean, as can be seen in the picture. Yet the letters that Ubuntu lets me type in Korean-mode are not Hangul as you can see, since I wrote this entirely in Korean-language-mode. So how do I fix this?
It looks like Hangul mode was turned off by default despite entering the Hangul language mode.
You can either click on Hangul mode to turn it on or turn it on by default by going to Setup->Start in hangul mode.
After you have restarted, Hangul mode will be turned on by default and you will be able to type Korean without having to manually click Hangul mode every time.