Comment 8 for bug 198759

Same issue here (French keymap). The right ctrl key generates events in xev, though the name of the key is surprising when compared to what is returned for the left ctrl key and compared to what was returned for the right ctrl key under gutsy

right ctrl pressed (hardy):

KeyPress event, serial 30, synthetic NO, window 0x3a00001,
    root 0x56, subw 0x0, time 72133229, (122,73), root:(1219,861),
    state 0x10, keycode 109 (keysym 0xfe11, ISO_Level5_Shift), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

left ctrl pressed (hardy):

KeyPress event, serial 30, synthetic NO, window 0x3a00001,
    root 0x56, subw 0x0, time 72169959, (42,102), root:(1139,890),
    state 0x10, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

right ctrl pressed (gutsy):
same as what is returned for hardy except for :
    state 0x10, keycode 109 (keysym 0xfe4, Control_R), same_screen YES,

Hope that helps