Comment 9 for bug 215496

Ctrl+Alt+Shift+Numlock does work for me as well.

I guess my question now is; has xkbset become deprecated?

Looking at the changelog from upstream (http://changelogs.ubuntu.com/changelogs/pool/universe/x/xkbset/xkbset_0.5-5.1/changelog) the last update to the Debian package was in Jan 2006 and was a non-maintainer upload. So, at least upstream in Debian, it seems unmaintained. If you look even further upstream (http://www.math.missouri.edu/~stephen/software/xkbset/) you see that the original maintainer of the app itself hasn't released anything since 2002.

So, it seems to be unmaintained all the way up. This problem we're encountering could easily be a change in X.org that has made the way xkbset handles these things no longer correct (I've not looked at it, I'm just stabbing in the dark here).