diff --git a/poky/scripts/lib/wic/canned-wks/qemux86-directdisk.wks b/poky/scripts/lib/wic/canned-wks/qemux86-directdisk.wks
index 1f8466a..cfa32bd 100644
--- a/poky/scripts/lib/wic/canned-wks/qemux86-directdisk.wks
+++ b/poky/scripts/lib/wic/canned-wks/qemux86-directdisk.wks
@@ -4,5 +4,5 @@
 
 include common.wks.inc
 
-bootloader  --timeout=0  --append="vga=0 uvesafb.mode_option=640x480-32 rw mem=256M ip=192.168.7.2::192.168.7.1:255.255.255.0 oprofile.timer=1 rootfstype=ext4 "
+bootloader  --timeout=0  --append="vga=0 rw mem=256M ip=192.168.7.2::192.168.7.1:255.255.255.0 oprofile.timer=1 rootfstype=ext4 "
 
diff --git a/poky/scripts/lib/wic/engine.py b/poky/scripts/lib/wic/engine.py
index edcfab3..f0c5ff0 100644
--- a/poky/scripts/lib/wic/engine.py
+++ b/poky/scripts/lib/wic/engine.py
@@ -284,8 +284,8 @@
             aname = "_%s" % name
             if aname not in self.__dict__:
                 setattr(self, aname, find_executable(name, self.paths))
-                if aname not in self.__dict__:
-                    raise WicError("Can't find executable {}".format(name))
+                if aname not in self.__dict__ or self.__dict__[aname] is None:
+                    raise WicError("Can't find executable '{}'".format(name))
             return self.__dict__[aname]
         return self.__dict__[name]
 
@@ -391,11 +391,8 @@
         def write_ptable(parts, target):
             with tempfile.NamedTemporaryFile(prefix="wic-sfdisk-", mode='w') as outf:
                 write_sfdisk_script(outf, parts)
-                cmd = "{} --no-reread {} < {} 2>/dev/null".format(self.sfdisk, target, outf.name)
-                try:
-                    subprocess.check_output(cmd, shell=True)
-                except subprocess.CalledProcessError as err:
-                    raise WicError("Can't run '{}' command: {}".format(cmd, err))
+                cmd = "{} --no-reread {} < {} ".format(self.sfdisk, target, outf.name)
+                exec_cmd(cmd, as_shell=True)
 
         if expand is None:
             sparse_copy(self.imagepath, target)
@@ -412,11 +409,14 @@
             for line in exec_cmd("{} -F {}".format(self.sfdisk, target)).splitlines():
                 if line.startswith("Unpartitioned space ") and line.endswith("sectors"):
                     free = int(line.split()[-2])
+                    # Align free space to a 2048 sector boundary. YOCTO #12840.
+                    free = free - (free % 2048)
             if free is None:
                 raise WicError("Can't get size of unpartitioned space")
 
             # calculate expanded partitions sizes
             sizes = {}
+            num_auto_resize = 0
             for num, part in enumerate(parts['partitiontable']['partitions'], 1):
                 if num in expand:
                     if expand[num] != 0: # don't resize partition if size is set to 0
@@ -426,10 +426,11 @@
                         sizes[num] = sectors
                 elif part['type'] != 'f':
                     sizes[num] = -1
+                    num_auto_resize += 1
 
             for num, part in enumerate(parts['partitiontable']['partitions'], 1):
                 if sizes.get(num) == -1:
-                    part['size'] += free // len(sizes)
+                    part['size'] += free // num_auto_resize
 
             # write resized partition table to the target
             write_ptable(parts, target)
diff --git a/poky/scripts/lib/wic/plugins/source/bootimg-efi.py b/poky/scripts/lib/wic/plugins/source/bootimg-efi.py
index beb74d7..0eb86a0 100644
--- a/poky/scripts/lib/wic/plugins/source/bootimg-efi.py
+++ b/poky/scripts/lib/wic/plugins/source/bootimg-efi.py
@@ -45,7 +45,7 @@
     name = 'bootimg-efi'
 
     @classmethod
-    def do_configure_grubefi(cls, creator, cr_workdir):
+    def do_configure_grubefi(cls, hdddir, creator, cr_workdir, source_params):
         """
         Create loader-specific (grub-efi) config
         """
@@ -62,6 +62,18 @@
                 raise WicError("configfile is specified but failed to "
                                "get it from %s." % configfile)
 
+        initrd = source_params.get('initrd')
+
+        if initrd:
+            bootimg_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
+            if not bootimg_dir:
+                raise WicError("Couldn't find DEPLOY_DIR_IMAGE, exiting")
+
+            cp_cmd = "cp %s/%s %s" % (bootimg_dir, initrd, hdddir)
+            exec_cmd(cp_cmd, True)
+        else:
+            logger.debug("Ignoring missing initrd")
+
         if not custom_cfg:
             # Create grub configuration using parameters from wks file
             bootloader = creator.ks.bootloader
@@ -76,6 +88,10 @@
 
             grubefi_conf += "linux %s root=%s rootwait %s\n" \
                 % (kernel, creator.rootdev, bootloader.append)
+
+            if initrd:
+               grubefi_conf += "initrd /%s\n" % initrd
+
             grubefi_conf += "}\n"
 
         logger.debug("Writing grubefi config %s/hdd/boot/EFI/BOOT/grub.cfg",
@@ -167,7 +183,7 @@
 
         try:
             if source_params['loader'] == 'grub-efi':
-                cls.do_configure_grubefi(creator, cr_workdir)
+                cls.do_configure_grubefi(hdddir, creator, cr_workdir, source_params)
             elif source_params['loader'] == 'systemd-boot':
                 cls.do_configure_systemdboot(hdddir, creator, cr_workdir, source_params)
             else: