执行“apt install nvidia-jetpack-dev”前，系统一些信息：
/boot/extlinux/extlinux.conf内容：
rt内核：
l4t大部分是38.2.0
执行“apt install nvidia-jetpack-dev”之后，安装成功后重启板卡；/boot/extlinux/extlinux.conf配置，内核会被更新，还有部分工具都会更新到R38.2.1：
extlinux.conf文件更新了，把我们原来的配置FDT那一行去掉了，我们原来的配置做了个备份！
实时内核变成非实时内核：
一些l4t工具更新到了R38.2.1：
自动更新问题，有什么办法解决吗？
Hi 1516775545,
Are you using the devkit or custom carrier board for Thor?
Could you refer to the following line in Kernel Customization — NVIDIA Jetson Linux Developer Guide for this issue?
To prevent apt upgrade from unintentionally overriding your custom kernel, you need to rename the kernel and initramfs images, and then update extlinux.conf. You can do this either on the host or on the target.
Thank you for your reply. Currently, we are no longer using apt-get install for installation. Instead, we have placed the CUDA package in the file system in advance
Hello, we have encountered another issue: when installing other tools, most of the system tools and content were updated. Although we followed the method you provided to avoid updating the kernel Image and initrd, the device tree and some tools were still updated to version R38.2.1!
When installing libnvinfer-dev, the operations are as follows:
sudo apt-get update
sudo apt-get install libnvinfer-dev
For the device tree, you can also specify FDT entry with custom DTB in extlinux.conf.
Is there any issue if other packages have been updated?
Please also check if Apt-upgrade uploads nvidia-l4t-kernel - #15 by DaneLLL can help for your case.
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