I have xubuntu installed on both my laptop and pc in pretty much the same way, but there must be some subtle difference because I can type in both greek letters and accents using keyboard switcher on my latptop, but I can't type in any greek accents, only letters, on my pc using the same method of switching the keyboard layout.

I also use Thai language on both my pc and laptop and have no issues typing in both letters and accents on either pc or laptop. I have sat and compared everything I can click on to compare the two (laptop and PC) but I cannot see any differences.

The PC is much easier to work on while at home, so I would really like to get this working on my pc if anyone has any ideas or suggestions.