All the BSP images are failing with these error messages:

Bug in initramfs /init detected. Dropping to a shell. Good luck!

sh: cannot set terminal process group (-1): Inappropriate ioctl for device
sh: no job control in this shell




I have found the reason: this commit in the master:

commit ffb6928f5783e5202d9849c3a185e29be1d41c63
Author: Damien Lespiau <damien.lespiau@intel.com>
Date:   Thu Sep 27 15:20:50 2012 +0100

    initrd: Spawn an emergency shell when something goes wrong
    
    set -e allows to exit if a command fails. We install a trap and execute
    emergency_shell() when either the init script exits or when ctrl-c is
    typed (say if we are stuck somewhere and we want to debug it).
    
    (From OE-Core rev: ae5e2bd994e3f60d3803ab56e6ed34d08fbc56f0)
    
    Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
    Signed-off-by: Ross Burton <ross.burton@intel.com>
    Signed-off-by: Saul Wold <sgw@linux.intel.com>
    Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/recipes-core/initrdscripts/files/init-live.sh b/meta/recipes-core/initrdscripts/files/init-live.sh
index 3fba7dc..fb7af31 100644
--- a/meta/recipes-core/initrdscripts/files/init-live.sh
+++ b/meta/recipes-core/initrdscripts/files/init-live.sh
@@ -2,6 +2,17 @@
 
 PATH=/sbin:/bin:/usr/sbin:/usr/bin
 
+emergency_shell()
+{
+    echo "Bug in initramfs /init detected. Dropping to a shell. Good luck!"
+    echo
+    sh
+}
+trap "emergency_shell" 0 2
+
+# exit immediately if a command fails
+set -e
+
 ROOT_MOUNT="/rootfs/"
 ROOT_IMAGE="rootfs.img"
 MOUNT="/bin/mount"





And now I and Tom are working on to fix this issue.