diff --git a/xdm.changes b/xdm.changes
index 040df54..ed6fca3 100644
--- a/xdm.changes
+++ b/xdm.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Fri Mar  9 16:46:58 UTC 2018 - sndirsch@suse.com
+
+- check for available graphics during runtime instead of %post,
+  since %post may already run during image building time in our
+  buildsystem (boo#1039497)
+
 -------------------------------------------------------------------
 Mon Feb 26 19:24:04 UTC 2018 - sndirsch@suse.com
 
diff --git a/xdm.spec b/xdm.spec
index 8b07951..6790a22 100644
--- a/xdm.spec
+++ b/xdm.spec
@@ -217,14 +217,6 @@ touch %{buildroot}%{_libexecdir}/X11/displaymanagers/console
 %service_add_post display-manager.service
 %{fillup_only -n displaymanager}
 %endif
-# Do no try to start Xserver on platforms which may ship without
-# graphics card (bsc#1039497)
-%ifarch aarch64 ppc64le
-if ! [ -c /dev/fb* -o -d /dev/dri ]; then
-    sed -i -e "s+DISPLAYMANAGER_STARTS_XSERVER=.*+DISPLAYMANAGER_STARTS_XSERVER=\"no\"+g" \
-              %{_sysconfdir}/sysconfig/displaymanager
-fi
-%endif
 %if 0%{?suse_version} >= 1330
 %{_sbindir}/update-alternatives --install %{_libexecdir}/X11/displaymanagers/default-displaymanager \
   default-displaymanager %{_libexecdir}/X11/displaymanagers/console 5
diff --git a/xdm.tar.bz2 b/xdm.tar.bz2
index b1ace0e..11b839e 100644
--- a/xdm.tar.bz2
+++ b/xdm.tar.bz2
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:5358018905e24cd25d161bf97d61b0a247fb8a2fe14a4f8318c97cf6a81aab2c
-size 23875
+oid sha256:555f89ea66078c531dbf8d27bb44a07452580b88de2f21bf7580149d4d8b41b3
+size 24065