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--- products:sbc:common:configurations:change-boot-logo [2022/07/08 05:08]
hyphop [U-Boot Logo]
+++ products:sbc:common:configurations:change-boot-logo [2026/02/02 05:04] (current)
gray update by using AI
@@ Line 3: / Line 3: @@
 ===== Introduction =====
-This document mainly introduces how to Change Boot Logo. The document is divided into two parts, the first part is for the Ubuntu platform, and the second part is for the Android platform.
+This document explains how to change the boot logo. It is divided into two parts: the first part covers the Ubuntu platform, and the second part covers the Android platform.
-===== Ubuntu =====
+===== Linux =====
 <WRAP info >
-Our official Ubuntu image will display 3 logos during system boot:
+The official Khadas Ubuntu image displays three logos during system boot:
   * U-Boot logo
-  * Kernel logo
+  * Linux kernel logo
-  * Ubuntu logo
+  * Plymouth (Ubuntu) boot splash logo
 </WRAP>
@@ Line 17: / Line 17: @@
 The U-Boot logo is located at ''/usr/share/fenix/logo/logo.bmp''.
-The image format is BMP with a resolution of ''500x500px'', and bit-depth of ''24 bits''.
-You can use Terminal to check the default logo image format:
+The required image format is BMP with a resolution of ''500x500px'' and a color depth of ''24 bits''.
+You can use the terminal to check the format of the default logo image:
 ```shell
 $ file /usr/share/fenix/logo/logo.bmp
+```
+Example output:
+```
 /usr/share/fenix/logo/logo.bmp: PC bitmap, Windows 3.x format, 500 x 500 x 24, image size 750002, resolution 2834 x 2834 px/m, cbSize 750056, bits offset 54
 ```
-You can replace the default logo with your own **BMP** image.
+To change it, simply replace the default ''logo.bmp'' file with your own BMP image that meets the format requirements.
-==== Kernel Logo ====
+==== Linux Kernel Logo ====
-Use the netpbm tool to convert png images to ppm images.
+Use the netpbm tool to convert a PNG image to the required PPM format.
 ```shell
@@ Line 37: / Line 41: @@
 $ pnmtoplainpnm linux_logo_clut224.pnm > logo_linux_clut224.ppm
 ```
-Put the converted ppm file into the ''drivers/video/logo/'' directory of the kernel, and replace the ''logo_linux_clut224.ppm'' file.
+Place the generated ''logo_linux_clut224.ppm'' file into the ''drivers/video/logo/'' directory of your Linux kernel source code, replacing the existing file.
-Re-compile the kernel, and the logo will be replaced with a new picture.
+Recompile the kernel. After flashing the new kernel, the boot logo will be updated.
-==== Ubuntu Logo ====
+==== Plymouth (Ubuntu Boot Splash) Logo ====
-The Ubuntu logo file is located at ''/usr/share/fenix/logo/logo.png'', replace the .png file to change the Ubuntu boot logo.
+The Plymouth logo file is located at ''/usr/share/fenix/logo/logo.png''. Replace this ''.png'' file to change the graphical boot splash screen.
+If you are [[/products/sbc/vim3/development/linux/build-ubuntu| building a custom image with Fenix]], you can change the logo by replacing the file at ''archives/logo/png/logo.png'' before the build.
-If you’ve [[/products/sbc/common/development/build-ubuntu| built the image with Fenix]], replace the file ''archives/logo/png/logo.png'' to change the logo.
 ===== Android =====
+Starting from Android 10, Rockchip merged the logo partition into the super partition, making it impossible to modify the boot logo dynamically without rebuilding the entire firmware. To address this, a new custom partition has been added to allow for dynamic logo updates.
+==== Logo Format Requirements====
+<WRAP info >
+  * **Source Location:** The original logo file in the Android source code is located at ''kernel-6.1/logo.bmp''.
+  * **Required Format:**
+    * 16-bit RGB565 BMP format.
+    * Resolution should be ≤ 1080P (1920x1080 pixels).
+</WRAP>
+==== Update Logo via ADB ====
+You can push a prepared ''logo.bmp'' file to the device using ADB.
+```shell
+$ adb root
+$ adb remount
+$ adb push logo.bmp /vendor/custom/
+$ adb reboot
+```
+Example command output:
+```shell
+$ adb root
+restarting adbd as root
+$ adb remount
+AVB verification is disabled, disabling verity state may have no effect
+Remounted /system as RW
+Remounted /vendor as RW
+Remounted /odm as RW
+Remounted /system_dlkm as RW
+Remounted /system_ext as RW
+Remounted /vendor_dlkm as RW
+Remounted /odm_dlkm as RW
+Remounted /product as RW
+Remount succeeded
+$ adb push logo.bmp /vendor/custom
+logo.bmp: 1 file pushed, 0 skipped. 655.0 MB/s (4147272 bytes in 0.006s)
+$ adb reboot
+```
+After the device reboots, the new logo should be displayed.
+==== Update Logo by Rebuilding Firmware ====
+This method involves modifying the Android source code and building a complete update package.
+) Replace the logo source: Replace the ''logo.bmp'' file in the ''kernel-6.1/'' directory of your Android source code.
+) build the update package:
+```shell
+$ cd PATH_YOUR_PROJECT
+$ source build/envsetup.sh && lunch kedge2-userdebug
+$ ./build.sh -UCKAu
+```
+This will generate an ''update.img'' file.
+) Flash the firmware: Burn the generated ''update.img'' to your device using the standard upgrade method (refer to the "How To Upgrade" guide). After the device restarts, the new boot logo will be active.

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