Comment 1 for bug 58086

Same bug occured on my system:
Error activating XKB configuration.
It can happen under various circumstances:
- a bug in libxklavier library
- a bug in X server (xkbcomp, xmodmap utilities)
- X server with incompatible libxkbfile implementation

X server version data:
The X.Org Foundation
70101000

If you report this situation as a bug, please include:
- The result of xprop -root | grep XKB
- The result of gconftool-2 -R /desktop/gnome/peripherals/keyboard/kbd

mart@bluebird:~$ xprop -root | grep XKB
_XKB_RULES_NAMES_BACKUP(STRING) = "xorg", "pc105", "uk", "", "lv3:ralt_switch"
_XKB_RULES_NAMES(STRING) = "xorg", "pc105", "uk", "", "lv3:ralt_switch"

mart@bluebird:~$ gconftool-2 -R /desktop/gnome/peripherals/keyboard/kbd
 layouts = [uk]
 model =
 options = [lv3 lv3:ralt_switch,grp grp:alts_toggle]
 overrideSettings = true