This ensures that xfce and most others DMs are preferred over
xterm. Previously slim used directory order, which is undefined.
Of course, it's just lucky that xfce < xterm lexicographically, but
that also applies to the other display managers, AFAIK. We should have
a way to specify a DM order, but that can be accomodated by generating
desktop entries like "<NN>-session.desktop".
Fixes#4300. Parenthetical to #12516.
This reverts commit f7d5e83abb. It
breaks the Firefox and Xfce tests:
in job ‘tests.firefox.x86_64-linux’:
cannot coerce a boolean to a string
in job ‘tests.xfce.x86_64-linux’:
infinite recursion encountered
Previously logging in via SLiM more than once didn't work because SLiM
doesn't clean up its PAM session properly (that is, in a child rather
than in the parent). Thus the slim process becomes part of the user
session's cgroup, among other things. This patch causes SLiM to exit
after the session has finished, after which systemd will restart
display-manager.service.
FixesNixOS/nixops#137.
