[oe] LXDM only showing black screen in krogoth

[Kai Iskratsch]

Our system is based on an intel-atom and i was just testing the upgrade from yocto 2.0 to 2.1. In Jethro lxdm with configured autologin to a xfce4 session is workign without problems.
now i tried a testbuild based on krogoth the build went through without problems, but in this image lxdm is just displaying a black screen. So i tried disabling the autologin, but that did not change anything.

lxdm and X seem to be running, there is just nothing displayed, only hint seems to be in lxdm log (** Message: spawn lxdm-session fail)


root at xxxxx~# systemctl status lxdm
● lxdm.service - LXDE Display Manager
   Loaded: loaded (/lib/systemd/system/lxdm.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2016-06-02 09:10:13 CEST; 4min 3s ago
Main PID: 532 (lxdm-binary)
   CGroup: /system.slice/lxdm.service
           ├─532 /usr/sbin/lxdm-binary
           └─571 /usr/bin/X -s 0 :0 vt07 -nolisten tcp -novtswitch -auth /var/run/lxdm/lxdm-:0.auth

Jun 02 09:10:13 xxxxx systemd[1]: Started LXDE Display Manager.
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: Xorg.0.log
URL: <http://lists.openembedded.org/pipermail/openembedded-devel/attachments/20160602/42d562ce/attachment-0004.ksh>
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: lxdm.log
URL: <http://lists.openembedded.org/pipermail/openembedded-devel/attachments/20160602/42d562ce/attachment-0005.ksh>