diff --git a/Android.mk b/Android.mk
index 96af417..8ef4830 100644
--- a/Android.mk
+++ b/Android.mk
@@ -45,8 +45,8 @@
     $(TARGET_RECOVERY_UI_LIB)
 
 LOCAL_SHARED_LIBRARIES := \
-    libbase \
-    liblog \
+    libbase.recovery \
+    liblog.recovery \
     librecovery_ui.recovery
 
 include $(BUILD_SHARED_LIBRARY)
@@ -64,6 +64,7 @@
 ifeq ($(TARGET_USERIMAGES_USE_F2FS),true)
 LOCAL_REQUIRED_MODULES += \
     make_f2fs.recovery \
+    fsck.f2fs.recovery \
     sload_f2fs.recovery
 endif
 
diff --git a/OWNERS b/OWNERS
index 79dd9f7..45c72e3 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,5 +1,4 @@
 elsk@google.com
-enh@google.com
 nhdo@google.com
 xunchang@google.com
-zhaojiac@google.com
+zhangkelvin@google.com
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index 28aa06f..023d48b 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -6,5 +6,6 @@
 clang_format = --commit ${PREUPLOAD_COMMIT} --style file --extensions c,h,cc,cpp
 
 [Hook Scripts]
+aosp_hook = ${REPO_ROOT}/frameworks/base/tools/aosp/aosp_sha.sh ${PREUPLOAD_COMMIT} "."
 checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}
                   --file_whitelist tools/ updater_sample/
diff --git a/fuse_sideload/fuse_sideload.cpp b/fuse_sideload/fuse_sideload.cpp
index 3d94803..07cbe96 100644
--- a/fuse_sideload/fuse_sideload.cpp
+++ b/fuse_sideload/fuse_sideload.cpp
@@ -225,7 +225,7 @@
 
 // Fetch a block from the host into fd->curr_block and fd->block_data.
 // Returns 0 on successful fetch, negative otherwise.
-static int fetch_block(fuse_data* fd, uint32_t block) {
+static int fetch_block(fuse_data* fd, uint64_t block) {
   if (block == fd->curr_block) {
     return 0;
   }
diff --git a/minui/Android.bp b/minui/Android.bp
index f68f6c8..02fb363 100644
--- a/minui/Android.bp
+++ b/minui/Android.bp
@@ -24,6 +24,7 @@
 cc_library {
     name: "libminui",
     recovery_available: true,
+    vendor_available: true,
 
     defaults: [
         "recovery_defaults",
@@ -51,4 +52,15 @@
         "libpng",
         "libz",
     ],
+
+    target: {
+        vendor: {
+            exclude_static_libs: [
+                "libsync",
+            ],
+            shared_libs: [
+                "libsync",
+            ],
+        },
+    },
 }
diff --git a/minui/graphics.cpp b/minui/graphics.cpp
index dce1e61..f25694a 100644
--- a/minui/graphics.cpp
+++ b/minui/graphics.cpp
@@ -42,6 +42,9 @@
 static GRSurface* gr_draw = nullptr;
 static GRRotation rotation = GRRotation::NONE;
 static PixelFormat pixel_format = PixelFormat::UNKNOWN;
+// The graphics backend list that provides fallback options for the default backend selection.
+// For example, it will fist try DRM, then try FBDEV if DRM is unavailable.
+constexpr auto default_backends = { GraphicsBackend::DRM, GraphicsBackend::FBDEV };
 
 static bool outside(int x, int y) {
   auto swapped = (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT);
@@ -340,7 +343,22 @@
   gr_draw = gr_backend->Flip();
 }
 
+std::unique_ptr<MinuiBackend> create_backend(GraphicsBackend backend) {
+  switch (backend) {
+    case GraphicsBackend::DRM:
+      return std::make_unique<MinuiBackendDrm>();
+    case GraphicsBackend::FBDEV:
+      return std::make_unique<MinuiBackendFbdev>();
+    default:
+      return nullptr;
+  }
+}
+
 int gr_init() {
+  return gr_init(default_backends);
+}
+
+int gr_init(std::initializer_list<GraphicsBackend> backends) {
   // pixel_format needs to be set before loading any resources or initializing backends.
   std::string format = android::base::GetProperty("ro.minui.pixel_format", "");
   if (format == "ABGR_8888") {
@@ -361,19 +379,22 @@
            ret);
   }
 
-  auto backend = std::unique_ptr<MinuiBackend>{ std::make_unique<MinuiBackendDrm>() };
-  gr_draw = backend->Init();
-
-  if (!gr_draw) {
-    backend = std::make_unique<MinuiBackendFbdev>();
-    gr_draw = backend->Init();
+  std::unique_ptr<MinuiBackend> minui_backend;
+  for (GraphicsBackend backend : backends) {
+    minui_backend = create_backend(backend);
+    if (!minui_backend) {
+      printf("gr_init: minui_backend %d is a nullptr\n", backend);
+      continue;
+    }
+    gr_draw = minui_backend->Init();
+    if (gr_draw) break;
   }
 
   if (!gr_draw) {
     return -1;
   }
 
-  gr_backend = backend.release();
+  gr_backend = minui_backend.release();
 
   int overscan_percent = android::base::GetIntProperty("ro.minui.overscan_percent", 0);
   overscan_offset_x = gr_draw->width * overscan_percent / 100;
diff --git a/minui/graphics_drm.cpp b/minui/graphics_drm.cpp
index 95759e3..9d31ff7 100644
--- a/minui/graphics_drm.cpp
+++ b/minui/graphics_drm.cpp
@@ -105,6 +105,8 @@
     perror("Failed to DRM_IOCTL_MODE_CREATE_DUMB");
     return nullptr;
   }
+  printf("Allocating buffer with resolution %d x %d pitch: %d bpp: %d, size: %llu\n", width, height,
+         create_dumb.pitch, create_dumb.bpp, create_dumb.size);
 
   // Cannot use std::make_unique to access non-public ctor.
   auto surface = std::unique_ptr<GRSurfaceDrm>(new GRSurfaceDrm(
@@ -128,13 +130,14 @@
     return nullptr;
   }
 
-  auto mmapped = mmap(nullptr, surface->height * surface->row_bytes, PROT_READ | PROT_WRITE,
-                      MAP_SHARED, drm_fd, map_dumb.offset);
+  auto mmapped =
+      mmap(nullptr, create_dumb.size, PROT_READ | PROT_WRITE, MAP_SHARED, drm_fd, map_dumb.offset);
   if (mmapped == MAP_FAILED) {
     perror("Failed to mmap()");
     return nullptr;
   }
   surface->mmapped_buffer_ = static_cast<uint8_t*>(mmapped);
+  printf("Framebuffer of size %llu allocated @ %p\n", create_dumb.size, surface->mmapped_buffer_);
   return surface;
 }
 
@@ -260,9 +263,16 @@
   /* If we still didn't find a connector, give up and return. */
   if (!main_monitor_connector) return nullptr;
 
+  for (int modes = 0; modes < main_monitor_connector->count_modes; modes++) {
+    printf("Display Mode %d resolution: %d x %d @ %d FPS\n", modes,
+           main_monitor_connector->modes[modes].hdisplay,
+           main_monitor_connector->modes[modes].vdisplay,
+           main_monitor_connector->modes[modes].vrefresh);
+  }
   *mode_index = 0;
   for (int modes = 0; modes < main_monitor_connector->count_modes; modes++) {
     if (main_monitor_connector->modes[modes].type & DRM_MODE_TYPE_PREFERRED) {
+      printf("Choosing display mode #%d\n", modes);
       *mode_index = modes;
       break;
     }
diff --git a/minui/graphics_fbdev.cpp b/minui/graphics_fbdev.cpp
index 2584017..0d0fabc 100644
--- a/minui/graphics_fbdev.cpp
+++ b/minui/graphics_fbdev.cpp
@@ -131,8 +131,6 @@
   SetDisplayedFramebuffer(0);
 
   printf("framebuffer: %d (%zu x %zu)\n", fb_fd.get(), gr_draw->width, gr_draw->height);
-
-  Blank(true);
   Blank(false);
 
   return gr_draw;
diff --git a/minui/include/minui/minui.h b/minui/include/minui/minui.h
index 163e41d..5470457 100644
--- a/minui/include/minui/minui.h
+++ b/minui/include/minui/minui.h
@@ -104,10 +104,19 @@
   ARGB = 4,
 };
 
-// Initializes the graphics backend and loads font file. Returns 0 on success, or -1 on error. Note
-// that the font initialization failure would be non-fatal, as caller may not need to draw any text
-// at all. Caller can check the font initialization result via gr_sys_font() as needed.
+enum class GraphicsBackend : int {
+  UNKNOWN = 0,
+  DRM = 1,
+  FBDEV = 2,
+};
+
+// Initializes the default graphics backend and loads font file. Returns 0 on success, or -1 on
+// error. Note that the font initialization failure would be non-fatal, as caller may not need to
+// draw any text at all. Caller can check the font initialization result via gr_sys_font() as
+// needed.
 int gr_init();
+// Supports backend selection for minui client.
+int gr_init(std::initializer_list<GraphicsBackend> backends);
 
 // Frees the allocated resources. The function is idempotent, and safe to be called if gr_init()
 // didn't finish successfully.
diff --git a/tools/recovery_l10n/res/values-as/strings.xml b/tools/recovery_l10n/res/values-as/strings.xml
index d956b9a..33a204d 100644
--- a/tools/recovery_l10n/res/values-as/strings.xml
+++ b/tools/recovery_l10n/res/values-as/strings.xml
@@ -6,9 +6,9 @@
     <string name="recovery_no_command" msgid="4465476568623024327">"কোনো আদেশ নাই"</string>
     <string name="recovery_error" msgid="5748178989622716736">"ত্ৰুটি!"</string>
     <string name="recovery_installing_security" msgid="9184031299717114342">"সুৰক্ষা আপডেইট ইনষ্টল কৰি থকা হৈছে"</string>
-    <string name="recovery_wipe_data_menu_header" msgid="550255032058254478">"Android ছিষ্টেম ল\'ড কৰিব নোৱাৰি। আপোনাৰ ডেটাত কিবা আসোঁৱাহ থকা যেন লাগিছে। আপুনি যদি এই বাৰ্তাটো পায়েই থাকে, আপুনি নিজৰ ডিভাইচটো ফেক্টৰী ডেটা ৰিছেট কৰি সেইটোত থকা ব্যৱহাৰকাৰীৰ আটাইবোৰ ডেটা মচিব লগা হ\'ব পাৰে।"</string>
+    <string name="recovery_wipe_data_menu_header" msgid="550255032058254478">"Android ছিষ্টেম ল\'ড কৰিব নোৱাৰি। আপোনাৰ ডেটাত কিবা আসোঁৱাহ থকা যেন লাগিছে। আপুনি যদি এই বাৰ্তাটো পায়েই থাকে, আপুনি নিজৰ ডিভাইচটো ফেক্টৰী ডেটা ৰিছেট কৰি সেইটোত থকা ব্যৱহাৰকাৰীৰ সকলো ডেটা মচিব লগা হ\'ব পাৰে।"</string>
     <string name="recovery_try_again" msgid="7168248750158873496">"আকৌ চেষ্টা কৰক"</string>
     <string name="recovery_factory_data_reset" msgid="7321351565602894783">"ফেক্টৰী ডেটা ৰিছেট"</string>
-    <string name="recovery_wipe_data_confirmation" msgid="5439823343348043954">"ব্যৱহাৰকাৰীৰ আটাইবোৰ ডেটা মচিবনে?\n\n এইটো কৰাৰ পাছত আনডু কৰিব নোৱাৰি!"</string>
+    <string name="recovery_wipe_data_confirmation" msgid="5439823343348043954">"ব্যৱহাৰকাৰীৰ সকলো ডেটা মচিবনে?\n\n এইটো কৰাৰ পিছত আনডু কৰিব নোৱাৰি!"</string>
     <string name="recovery_cancel_wipe_data" msgid="66987687653647384">"বাতিল কৰক"</string>
 </resources>
diff --git a/update_verifier/Android.bp b/update_verifier/Android.bp
index ff2eff9..220b007 100644
--- a/update_verifier/Android.bp
+++ b/update_verifier/Android.bp
@@ -33,6 +33,25 @@
     ],
 }
 
+python_library_host {
+    name: "care_map_proto_py",
+    srcs: [
+        "care_map.proto",
+    ],
+    proto: {type: "lite", canonical_path_from_root: false},
+    version: {
+        py2: {
+            enabled: true,
+        },
+        py3: {
+            enabled: true,
+        },
+    },
+    visibility: [
+        "//build/make/tools/releasetools:__subpackages__",
+    ],
+}
+
 cc_library_static {
     name: "libupdate_verifier",
 
diff --git a/update_verifier/care_map_generator.py b/update_verifier/care_map_generator.py
index c6f2dad..b1396a4 100644
--- a/update_verifier/care_map_generator.py
+++ b/update_verifier/care_map_generator.py
@@ -111,14 +111,14 @@
   logging.basicConfig(level=logging.INFO if args.verbose else logging.WARNING,
                       format=logging_format)
 
-  with open(args.input_care_map, 'r') as input_care_map:
+  with open(args.input_care_map, 'rb') as input_care_map:
     content = input_care_map.read()
 
   if args.parse_proto:
     result = ParseProtoMessage(content, args.fingerprint_enabled).encode()
   else:
     care_map_proto = GenerateCareMapProtoFromLegacyFormat(
-        content.rstrip().splitlines(), args.fingerprint_enabled)
+        content.decode().rstrip().splitlines(), args.fingerprint_enabled)
     result = care_map_proto.SerializeToString()
 
   with open(args.output_file, 'wb') as output: