Swap alt/ctrl/win does not work

[byron.hawkins]

I'm trying to remap the alt/ctrl/win keys on my Lenovo t540p running Kubuntu 15.04. So far none of the typical solutions is working:

1. System Settings > Input Devices > Keyboard (tab) > Advanced (tab) > Ctrl key position (tree item) > Left Alt as Ctrl, Left Ctrl as Win, Left win as Alt (tree item)
2. Edit /usr/share/X11/xkb/symbols/pc to set up the same mapping

I restarted the system after trying each of the above, but the keys are not remapped. Does anyone know if this functionality got broken in 15.04, or if there is another way to remap the keys? Thanks for your help.

[byron.hawkins]

This seems to work:

1. System Settings > Input Devices > Keyboard (tab) > Advanced (tab) > Alt/Win key behavior (tree item) > Ctrl is mapped to Alt keys, Alt is mapped to Win keys (tree item)

So that's good enough for me, but it still seems like something is broken here. Let me know if there is a way to fix the other remapping featues.