Comment # 1 on bug 1205109 from Dr. Werner Fink

Created attachment 862687 [details]
/usr/bin/emacs modified shell script

(In reply to Zim Tsui from comment #0)

> # Possible reason
> 
> The binary `/usr/bin/emacs` is not built from emacs source, but made by the
> SUSE package maintainer. The binary checks whether it's run in terminal or X
> to determine whether it should exec `emacs-nox` or `emacs-x11`.

/usr/bin/emacs is a shell script and not a binary which enables to switch
between emacs-x11, emacs-gtk, or emacs-nox.  Abd indeed this script also tries
to provide a connection to the dbus API if not given.

> 
> The `/usr/bin/emacs` binary defines an environment variable
> `XDG_RUNTIME_DIR` as `/run/user/<USER_ID>` arbitrarily. But `/run/user/0`
> doesn't exist because it  should be created by `/etc/profile` in a login
> shell. And `sudo` doesn't spawn a new login shell.

The /run/user/<USER_ID> will not be created by the login shell but by the
systemd pam module pam_systemd(.so) -> `man 8 pam_systemd'

Give the attached shell script as a replacement of /usr/bin/emacs a try and
report if this does work for you.