> [root@rhel7-vmware ~]# ls -1 /usr/share/xsessions/*kde*
> xdg_session=kde kde-plasma kde4
Adding 1-kde-plasma-standard to the list of xdg_session names works.
I have a lot of faith in Red Hat at the moment so I reported this upstream:
Red Hat aren't playing ball here, so we'll have to add their mangled name to our list.
Fixed in r29337.
Tested using server build 4497, works as expected.