Wifi not connecting after rebuilding the kernel on Jetson orin nano

[929842867]

I have customized and reinstalled the Jetson Orin Nano kernel and successfully flashed it (R36.4). (This is the post where I previously asked for help: (Jetson Orin Nano 8GB Development Board Kernel Customization, Compilation, and Ubuntu 22.04 Flash)`)

Now, on the freshly installed Ubuntu 22.04, the WiFi icon is not showing up. I encountered the same issue in the previous version, and I was able to solve it by downloading and installing from (https://backports.docs.kernel.org/releases.html). However, this time I encountered an error:

How should I resolve this? Should I download from this websitehttps://developer.nvidia.com/embedded/jetson-linux-r3640? But I’m not sure which one to download.

[DaneLLL]

Hi,
Please check this and see if it helps:

Jetson/L4T/r36.3.x patches - eLinux.org
Enable AX210 WIFI module

Looks like for certain WIFI modules, some kernel configs have to enabled. You may also check with the vendor if some configs are required.

[929842867]

As you can see, I used the exact method you provided. This method worked in my previous attempts, but after reflashing, it failed:

jetson@jetson-desktop:~/backports-6.1.97-1$ make defconfig-iwlwifi
/--------------
| Your kernel headers are incomplete/not installed.
| Please install kernel headers, including a .config
| file or use the KLIB/KLIB_BUILD make variables to
| set the kernel to build against, e.g.
|   make KLIB=/lib/modules/3.1.7/
| to compile/install for the installed kernel 3.1.7
| (that isn't currently running.)
\--
make: *** [Makefile:41: defconfig-iwlwifi] Error 1

Then I tried to download linux-headers-tegra via apt, but it also failed:

jetson@jetson-desktop:~/backports-6.1.97-1$ sudo apt-get install linux-headers-tegra
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package linux-headers-tegra

So, could you tell me where I can install linux-headers-tegra?

[DaneLLL]

Hi,
Please check if you can see the header packages and install them:

$ apt list -a | grep "linux-headers-nvidia-tegra"
linux-headers-nvidia-tegra/jammy-updates,jammy-security 5.15.0.1030.30 arm64

or

$ apt list -a | grep "linux-nvidia-headers"
...
linux-nvidia-headers-5.15.0-1070/jammy-updates,jammy-security 5.15.0-1070.71 all

[929842867]

[DaneLLL]

Hi,
Are you able to build it on host PC? Or hit same failure on both Orin Nano device and host PC?

[929842867]

Yes, it was possible before flashing and recompiling the kernel,.