diff --git a/grub-lakitu/grub-core/loader/efi/linux.c b/grub-lakitu/grub-core/loader/efi/linux.c
index 8890bdf..dbf63e2 100644
--- a/grub-lakitu/grub-core/loader/efi/linux.c
+++ b/grub-lakitu/grub-core/loader/efi/linux.c
@@ -43,12 +43,22 @@
   shim_lock = grub_efi_locate_protocol(&guid, NULL);
   grub_dprintf ("secureboot", "shim_lock: %p\n", shim_lock);
   if (!shim_lock)
-    return 0;
+    {
+      grub_dprintf ("secureboot", "shim not available\n");
+      return 0;
+    }
 
-  status = shim_lock->verify(data, size);
+  grub_dprintf ("secureboot", "Asking shim to verify kernel signature\n");
+  status = shim_lock->verify (data, size);
   grub_dprintf ("secureboot", "shim_lock->verify(): %ld\n", status);
   if (status == GRUB_EFI_SUCCESS)
-    return 1;
+    {
+      grub_dprintf ("secureboot", "Kernel signature verification passed\n");
+      return 1;
+    }
+
+  grub_dprintf ("secureboot", "Kernel signature verification failed (0x%lx)\n",
+		(unsigned long) status);
 
   return -1;
 }
diff --git a/grub-lakitu/grub-core/loader/i386/efi/linux.c b/grub-lakitu/grub-core/loader/i386/efi/linux.c
index 2096ffc..4683ee2 100644
--- a/grub-lakitu/grub-core/loader/i386/efi/linux.c
+++ b/grub-lakitu/grub-core/loader/i386/efi/linux.c
@@ -114,6 +114,8 @@
       goto fail;
     }
 
+  grub_dprintf ("linuxefi", "initrd_mem = %lx\n", (unsigned long) initrd_mem);
+
   params->ramdisk_size = size;
   params->ramdisk_image = (grub_uint32_t)(grub_uint64_t) initrd_mem;
 
@@ -202,6 +204,8 @@
       goto fail;
     }
 
+  grub_dprintf ("linuxefi", "params = %lx\n", (unsigned long) params);
+
   grub_memset (params, 0, 16384);
 
   grub_memcpy (&lh, kernel, sizeof (lh));
@@ -239,6 +243,9 @@
       goto fail;
     }
 
+  grub_dprintf ("linuxefi", "linux_cmdline = %lx\n",
+		(unsigned long)linux_cmdline);
+
   grub_memcpy (linux_cmdline, LINUX_IMAGE, sizeof (LINUX_IMAGE));
   grub_create_loader_cmdline (argc, argv,
                               linux_cmdline + sizeof (LINUX_IMAGE) - 1,
@@ -273,9 +280,10 @@
   grub_memcpy (params, &lh, 2 * 512);
 
   params->type_of_loader = 0x21;
+  grub_dprintf("linuxefi", "kernel_mem: %p handover_offset: %08x\n",
+	       kernel_mem, handover_offset);
 
  fail:
-
   if (file)
     grub_file_close (file);