Hello i’m a little freshy here so i’m sorry if this is a basic cuestion.
I’m working with a customized jetson orin nx board using jetpack 6.2 and i am trying to change the default pictures used for avatar and background after the flashing. I achieve to change the slpash screen making a new uefi_jetson.bin in linux_for_tegra’s bootloader folder but i can not find how to change the rest of images.
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Changing the default pictures used for avatar and background on a customized Jetson Orin NX board using JetPack 4.6.2 involves modifying the root file system and updating the relevant configuration files.
To change the default pictures, you’ll need to update the following files:
/usr/share/backgrounds/jetson_logo.png/usr/share/backgrounds/jetson_default_background.jpgYou can replace these files with your custom images, making sure to maintain the same file format and resolution.
However, since you’ve already modified the uefi_jetson.bin file in the linux_for_tegra/bootloader folder to change the splash screen, you’ll need to ensure that the changes are properly propagated to the root file system.
Here are the steps to follow:
rootfs.tar file that includes your custom images. You can use the tar command to create a new archive file:sudo tar -cvf rootfs.tar /usr/share/backgrounds
This will create a new rootfs.tar file that includes the updated jetson_logo.png and jetson_default_background.jpg files.
bootloader folder: You’ll need to update the bootloader folder with the new uefi_jetson.bin file that you created earlier. Make sure to copy the updated file to the correct location:sudo cp uefi_jetson.bin /home/ubuntu/linux_for_tegra/bootloader/
bootloader folder, you can re-flash the device using the flash.sh script:sudo ./flash.sh jetson-orin-nx-devkit mmcblk0p1
This will re-flash the device with the updated root file system and bootloader.
After re-flashing the device, you should see the updated avatar and background images.
Comparison with other Jetson modules:
The process of changing the default pictures on a Jetson Orin NX board is similar to other Jetson modules, such as the Jetson Xavier NX and Jetson AGX Xavier. However, the specific file locations and configuration files may vary depending on the module and JetPack version.
For example, on a Jetson Xavier NX board using JetPack 4.6.2, the avatar and background images are located in the following files:
/usr/share/backgrounds/xavier_logo.png/usr/share/backgrounds/xavier_default_background.jpgSimilarly, on a Jetson AGX Xavier board using JetPack 4.6.2, the avatar and background images are located in the following files:
/usr/share/backgrounds/agx_xavier_logo.png/usr/share/backgrounds/agx_xavier_default_background.jpgIn summary, changing the default pictures on a customized Jetson Orin NX board using JetPack 4.6.2 involves updating the root file system and bootloader folder, and re-flashing the device with the updated files.
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i am a little confused, all these changes should be in my host pc folder? This jetpack will be flashed into the jetson by using a customized flashing program. I am currently working in this folder ~/nvidia/nvidia_sdk/JetPack_6.2_Linux_JETSON_ORIN_NX_TARGETS/Linux_for_Tegra. My jetpack it is not the 4.6.2 im using 6.2.0
Hi rgmartin,
The UEFI splash screen is handled separately, and it sounds like you have already completed that part with your updated uefi_jetson.bin.
For the remaining login/background images in JetPack 6.2, please check the rootfs side in your host Linux_for_Tegra directory before flashing.
Login-screen logo / avatar
Could you clarify which exact screen you mean by “avatar”? Do you mean the NVIDIA logo shown on the login screen, or the per-user account icon/avatar?
For the JetPack 6.2 / Jetson Linux R36.4.x rootfs, the documented login-logo asset is:
Linux_for_Tegra/rootfs/usr/share/backgrounds/NVIDIA_Login_Logo.png
Desktop background
For the default desktop wallpaper, please check these files in the host-side rootfs before flashing:
Linux_for_Tegra/rootfs/usr/share/backgrounds/NVIDIA_Wallpaper.jpg
Linux_for_Tegra/rootfs/etc/xdg/autostart/nvbackground.sh
nvbackground.sh is the script used to set the NVIDIA default wallpaper when the desktop session starts, so you may need to update the image file and/or the path referenced by that script.
Reference:
Jetson Linux R36.4.3 Developer Guide:
NVIDIA_Login_Logo.png, NVIDIA_Wallpaper.jpg, and nvbackground.sh:Hope this helps!
I finally achieve it but following claude’s steps hahahaa, anyway thank you so much. If someone needs the steps i paste here my reports but in spanish:
Comentarios
El logo blanco que aparece en la pantalla de login está controlado por un script llamado .xsessionrc que vive dentro del rootfs. Para cambiarlo hay que hacer dos cosas: meter la imagen nueva y decirle al script que use esa imagen en lugar de la de NVIDIA.
Paso 1 — Preparar la imagen
Se redimensionó el logo de la empresa a un tamaño adecuado para la pantalla de login con el siguiente comando:
bash
convert ~/Descargas/Logotipo-Blanco.jpg -resize 400x67 ~/Descargas/login_logo.png
Paso 2 — Copiar la imagen al rootfs
bash
sudo cp ~/Descargas/login_logo.png ~/nvidia/nvidia_sdk/JetPack_6.2_Linux_JETSON_ORIN_NX_TARGETS/Linux_for_Tegra/rootfs/usr/share/backgrounds/login_logo.png
Paso 3 — Cambiar la referencia en la plantilla de usuario
Este archivo es la plantilla que Ubuntu usa para todos los usuarios nuevos que se creen:
bash
sudo sed -i 's|logo_path="/usr/share/backgrounds/NVIDIA_Login_Logo.png"|logo_path="/usr/share/backgrounds/login_logo.png"|g' ~/nvidia/nvidia_sdk/JetPack_6.2_Linux_JETSON_ORIN_NX_TARGETS/Linux_for_Tegra/rootfs/etc/skel/.xsessionrc
Paso 4 — Cambiar la referencia en el usuario existente
Como el usuario sensia ya estaba creado, hay que aplicar el mismo cambio en su copia personal del archivo:
bash
sudo sed -i 's|logo_path="/usr/share/backgrounds/NVIDIA_Login_Logo.png"|logo_path="/usr/share/backgrounds/login_logo.png"|g' ~/nvidia/nvidia_sdk/JetPack_6.2_Linux_JETSON_ORIN_NX_TARGETS/Linux_for_Tegra/rootfs/home/yourusr/.xsessionrc
Paso 5 — Verificar que todo está correcto
bash
grep "logo_path" ~/nvidia/nvidia_sdk/JetPack_6.2_Linux_JETSON_ORIN_NX_TARGETS/Linux_for_Tegra/rootfs/etc/skel/.xsessionrc
Debe mostrar logo_path="/usr/share/backgrounds/login_logo.png". Si es así, ya se puede flashear.
Lo primero que hago es meterme en la carpeta Linux_for_Tegra y ejecutar el script oficial de NVIDIA para crear el usuario:
bash
sudo ./tools/l4t_create_default_user.sh -u yourusr -p yourpswrd -n name --accept-license
Si te dice que el usuario ya existe, no pasa nada
Luego copio la imagen del avatar a la carpeta donde Ubuntu guarda los iconos de usuario. Aquí, el archivo de destino tiene que llamarse igual que el usuario y sin extensión, sin el .png, porque así es como Ubuntu lo busca:
bash
sudo cp ~/Descargas/MicrosoftTeams-avatar.png rootfs/var/lib/AccountsService/icons/sensia
Después creo un archivo de configuración que le dice al sistema que ese usuario tiene una foto asignada y dónde está:
bash
sudo tee rootfs/var/lib/AccountsService/users/sensia <<EOF
[User]
Session=
Icon=/var/lib/AccountsService/icons/youricon
SystemAccount=false
EOF
Luego le doy los permisos correctos a los dos archivos bash
sudo chmod 644 rootfs/var/lib/AccountsService/icons/yourusr
sudo chmod 644 rootfs/var/lib/AccountsService/users/yourusr
Y antes de flashear compruebo que todo está bien con estos dos comandos:
bash
ls -lh rootfs/var/lib/AccountsService/icons/sensia
cat rootfs/var/lib/AccountsService/users/sensia
El primero tiene que mostrar el archivo con varios KB de tamaño, y el segundo tiene que mostrar las cuatro líneas que escribimos antes. Si todo está correcto, ya puedes flashear y al arrancar la Jetson veremos el avatar en la pantalla de login