👀 Views: 57 💬 Answers: 1 📅 Created: 2025-06-16

linux ubuntu kernel-modules bash

I'm a bit lost with I'm prototyping a solution and Quick question that's been bugging me - I'm currently trying to load a custom kernel module on my Ubuntu 22.04 system, but I've encountered an scenario where the module fails to load during the boot process... The kernel module is properly compiled and resides in `/lib/modules/$(uname -r)/extra/my_module.ko`. However, when I check the boot logs, I see the following behavior: ``` modprobe: FATAL: Module my_module not found in modules.dep ``` I verified that the module was built for the current kernel by using `uname -r`, and I ran `depmod` after placing the module in the directory. The output of `depmod` shows that it recognizes my module: ``` $ depmod -n my_module.ko ``` However, when I attempt to load the module manually using `modprobe my_module`, it works just fine. It seems that the question arises only during boot time. To troubleshoot, I checked the `/etc/modules` file to ensure my module is listed there, which it is: ``` # /etc/modules my_module ``` I also examined the systemd journal logs for any additional context: ``` journalctl -b | grep my_module ``` The logs show that the module loading process fails, but there are no explicit reasons given. I'm unsure if there are other dependencies or conflicts that might be causing this scenario or if there's a specific timing scenario during the boot process. I would appreciate any insights on what might be going wrong or how to further diagnose this scenario. Has anyone else experienced similar problems with custom kernel modules not loading at boot on Ubuntu? What steps can I take to resolve this? My development environment is Ubuntu. Am I missing something obvious? I'm coming from a different tech stack and learning Bash.