Cannot install any kernel modules

[onioniot]

Cannot install any kernel modules

[greenbreakfast]

Yep, as the documentation mentions, it is only possible to install kernel modules from the Onion Package Repo. It is not possible to install kernel modules from any other repos because of the reasons outlined in the text you've quoted.

How are you trying to install these kernel modules?

[corndog2000]

With opkg like
opkg install kmod-fs-hfs
in the tutorial

That command returns

Installing kmod-fs-hfs (4.4.135-1) to root...
Downloading http://downloads.lede-project.org/releases/17.01-SNAPSHOT/targets/ramips/mt7688/packages/kmod-fs-hfs_4.4.135-1_mipsel_24kc.ipk
Configuring kmod-input-joydev.
failed to find a module named joydev
Collected errors:
satisfy_dependencies_for: Cannot satisfy the following dependencies for kmod-fs-hfs:
kernel (= 4.4.135-1-fd6e4535420b1cebe485c935e0d20c0d)
opkg_install_cmd: Cannot install package kmod-fs-hfs.
pkg_run_script: package "kmod-input-joydev" postinst script returned status 255.
opkg_configure: kmod-input-joydev.postinst returned 255.

[greenbreakfast]

Judging by the URL it's downloading from, it looks like you have the LEDE package repos enabled. What's happening is that it's trying to install the kernel modules with the higher verison number and it happens that the LEDE package repo has the kernel modules built for a later version of the kernel.

You'll have to disable the LEDE package repos so that opkg will only try to install kernel modules from the Onion package repos. For more info on enabling/disabling package repos, see this Docs article: https://docs.onion.io/omega2-docs/using-opkg.html#using-opkg-switch-to-lede-repos