I hope to have some way to decide whether to boot the system from the emmc or from the USB drive when the Jetson TX2 NX starts up

Autonomous Machines Jetson & Embedded Systems Jetson TX2
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I hope to have some way to decide whether to boot the system from the emmc or from the USB drive when the Jetson TX2 NX starts up. Is this achievable? I switched the boot device now by modifying/boot/extLinux/extlinux.cn, but this requires modifying the file and restarting after booting. Is there any other way?

2

你所謂的"boot the system"並不完整正確…

extlinux.conf只能改rootfs mount的位置 真的開機用的boot device要從uboot看.

比方說好了, 你現在的kernel跟extlinux.conf檔案都還是從emmc讀的. 跟你的usb drive沒有關聯. 這並不是完整的boot the system from usb drive

3

请问如何进入到uboot看我的boot device设置？

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我在U-Boot中修改启动顺序，将uboot中的启动顺序修改为usb0为第一启动项后usb0的系统启动失败了，Jetson启动了emmc中的系统。我的usb设备中的系统是直接使用dd命令直接复制emmc中的系统得到的。是否因为是这个原因？如果是，能否给我具体的usb设备系统烧录方法。

7

Hi,

抱歉 忘了說明 其實TX2系列沒有辦法從USB開機 這是一個known issue.

https://docs.nvidia.com/jetson/archives/l4t-archived/l4t-3273/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/flashing.html#wwpID0E0HO0HA

請改用nvme之類的進行開機.

8

好的。我注意到你发送的链接中 Flashing to a USB Drive 这部分下文提到了 Flashing to an SD Card ，请问烧写系统至SD卡中现在是否支持TX2 NX？

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如果你要的是燒錄到sdcard, 那你得用的是initrdflash, 不能用flash.sh.

同一份document → Flashing with initrd

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我在烧录中遇到了问题。我执行过的命令：

sudo apt install libxml2-utils simg2img network-manager abootimg sshpass device-tree-compiler 
#cd Linux_for_Tegra
tar xvjf secureboot R32.7.2 aarch64.tbz2 
systemctl stop udisks2.service

接下来我将TX2 NX进入恢复模式，保持SD卡安装在设备上，将TX2 NX与Host PC连接，开始烧写。
sudo ./tools/kernel_flash/l4t_initrd_flash.sh jetson-xavier-nx-devkit-tx2-nx mmcblk1p1
终端输出停止在：

Finish generating flash package.
/home/oran/Documents/Linux_for_Tegra/tools/kernel_flash/l4t_initrd_flash_internal.sh  --usb-instance 3-3 --device-instance 0 --flash-only  jetson-xavier-nx-devkit-tx2-nx mmcblk1p1
Start flashing device: 3-3, rcm instance: 0, PID: 13308
Log will be saved to Linux_for_Tegra/initrdlog/flash_3-3_0_20240322-153503.log 
Ongoing processes: 13308
Ongoing processes: 13308
Ongoing processes: 13308
Ongoing processes: 13308
Ongoing processes: 13308
Ongoing processes: 13308
Ongoing processes: 13308
Ongoing processes:
Flash complete (WITH FAILURES)

我尝试在命令中添加参数：
sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-only jetson-xavier-nx-devkit-tx2-nx mmcblkn1p1

Finish generating flash package.
/home/oran/Videos/Linux_for_Tegra/tools/kernel_flash/l4t_initrd_flash_internal.sh --external-only --usb-instance 3-3 --device-instance 0 --flash-only  jetson-xavier-nx-devkit-tx2-nx mmcblkn1p1
Start flashing device: 3-3, rcm instance: 0, PID: 25522
Log will be saved to Linux_for_Tegra/initrdlog/flash_3-3_0_20240322-163355.log 
Ongoing processes: 25522
Ongoing processes: 25522
Ongoing processes: 25522
Ongoing processes: 25522
Ongoing processes: 25522
Ongoing processes: 25522
Ongoing processes:

请问是我的命令不对或者其他部分出现了问题吗？

11

下面是完整的Log
with–external-only.txt (25.2 KB)
without–external-only.txt (65.7 KB)

12

這partition錯了吧

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抱歉这里拼写错误，将其替换为mmcblk1p1似乎得到了同样的错误：

sudo ./tools/kernel_flash/l4t_initrd_flash.sh  --external-only jetson-xavier-nx-devkit-tx2-nx mmcblk1p1

#输出
Finish generating flash package.
/home/oran/Videos/Linux_for_Tegra/tools/kernel_flash/l4t_initrd_flash_internal.sh --external-only --usb-instance 3-3 --device-instance 0 --flash-only  jetson-xavier-nx-devkit-tx2-nx mmcblk1p1
Start flashing device: 3-3, rcm instance: 0, PID: 10503
Log will be saved to Linux_for_Tegra/initrdlog/flash_3-3_0_20240325-121031.log 
Ongoing processes: 10503
Ongoing processes: 10503
Ongoing processes: 10503
Ongoing processes: 10503
Ongoing processes: 10503
Ongoing processes: 10503
Ongoing processes:

下面是完整的日志，一同附上"Log will be saved to Linux_for_Tegra/initrdlog/flash_3-3_0_20240325-121031.log "中提到的日志，希望有所帮助
0325.txt (25.1 KB)

flash_3-3_0_20240325-121031.log (8.6 KB)

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Please use such command. Replace the “your_board_config” in above to match the one you are using for flash.

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