I have two x64 systems (one was originally a clone of the other, since diverged) that have a problem with keyboard mapping.
The down and right arrow keys add a <CR> to each keypress, things like double quotes have to be entered twice at the keyboard before they appear in a document. I think its a X problem as console is ok, and I have tried quite a number of X guides with no success. The system(s) started with gnome 3 for a month, then moved to LXDE if that gives a clue. All I want is a normal english international keyboard with en_AU language ... BillK