User login fail on gnome 

On a fresh installation of openSUSE 42.1 Beta1 a user login to GNOME or GNOME
unter Wayland failed and turned back to login window. 

Unsing IcdeWm or TWM login worked fine:


to steps reproduce 
 install a openSUSE 42.1 Beta1
 select GNOME as default GUI
 add an user e.g. "tux"
 login as tux on GNOME


In user log file  /home/tux/.local/share/xorg/Xorg.0.log
we get:
VGA arbiter: cannot open kernel arbiter, no multi-card support
see below


Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (WW) VGA arbiter:
cannot open kernel arbiter, no multi-card support
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (EE) qxl(0): [drm]
failed to set drm interface version.
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (EE) qxl(0): Kernel
modesetting setup failed
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (II) UnloadModule:
"qxl"
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (EE) Screen(s) found,
but none have a usable configuration.
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (EE)
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: Fatal server error:
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (EE) no screens
found(EE)
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (EE)
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: Please consult the The
X.Org Foundation support
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: at http://wiki.x.org
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: for help.
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (EE) Please also check
the log file at "/home/tux/.local/share/xorg/Xorg.0.log" for additional
information.
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (EE)
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: (EE) Server terminated
with error (1). Closing log file.
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[2067]: Unable to run X server
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[1564]: The XKEYBOARD keymap
compiler (xkbcomp) reports:
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[1564]: > Warning:         
Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[1564]: >                  
Ignoring extra symbols
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[1564]: Errors from xkbcomp are
not fatal to the X server
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[1564]: The XKEYBOARD keymap
compiler (xkbcomp) reports:
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[1564]: > Warning:         
Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[1564]: >                  
Ignoring extra symbols
Sep 30 15:18:49 linux /usr/lib/gdm/gdm-x-session[1564]: Errors from xkbcomp are
not fatal to the X server
Sep 30 15:20:49 linux systemd[2060]: pam_unix(systemd-user:session): session
closed for user tux