Comment 104 for bug 1240198

I don't know if this has already been mentioned, but I'll add this to the bug report because it can be a workaround:

If you have chosen to login automaticaly, logoff and in the logon screen you'll notice the keyboard has changed (icon next to clock). Now just change it back to your preference and upon next reboot the keyboard-layout will be to your preference (as is the case with ubuntu 14.04.3 x64 I've found).