diff --git a/README.adoc b/README.adoc
index 1403a08..f59a660 100644
--- a/README.adoc
+++ b/README.adoc
@@ -2267,6 +2267,16 @@ Build and run:
 ./run -x
 ....
 
+TODO broken as of: 9e450f0da3dedddfd5f0a23160cffa26bc98c272. Now the graphic window shows normally, until an init script starts X at startup automatically, prints `Starting Xorg:` and the screen is completely black.
+
+If we put a terminal on the serial as explained at <<tty>>, and run `dmesg`, we see a <<bug_on>>:
+
+....
+[    2.809104] WARNING: CPU: 0 PID: 51 at drivers/gpu/drm/ttm/ttm_bo_vm.c:304 ttm_bo_vm_open+0x37/0x40
+....
+
+Before updating Buildroot to 2018.05, this is what happened:
+
 We don't build X11 by default because it takes a considerable amount of time (about 20%), and is not expected to be used by most users: you need to pass the `-x` flag to enable it.
 
 Inside QEMU:
diff --git a/br2/x11 b/br2/x11
index e5d403b..3ba0c97 100644
--- a/br2/x11
+++ b/br2/x11
@@ -1,5 +1,3 @@
-# X11
-# https://unix.stackexchange.com/questions/70931/how-to-install-x11-on-my-own-linux-buildroot-system/306116#306116
 BR2_PACKAGE_XAPP_TWM=y
 BR2_PACKAGE_XAPP_XCALC=y
 BR2_PACKAGE_XAPP_XCLOCK=y