By changing XKBLAYOUT in /etc/default/keyboard to either "gr" or "gr,us" and rebooting, lightdm then forces all the users to have only Greek layout.
It appears that lightdm_get_layout() assumes that users only need one layout, while Greek users need two.
By changing XKBLAYOUT in /etc/default/ keyboard to either "gr" or "gr,us" and rebooting, lightdm then forces all the users to have only Greek layout.
It appears that lightdm_ get_layout( ) assumes that users only need one layout, while Greek users need two.