No Thunderbolt on Primus (Thinkpad C14)

I’ve added the modules and updated the initramfs as the Chrultrabook post-install docs instructed (even updated the kernel to 6.16.3, just in case), but my Hyperdrive port replicator and DisplayPort monitors are still inert.

Operating System is Debian 13, firmware is MrChromebox’s UEFI Full Rom.
I successfully tested DisplayPort over USB-C on Ultramarine Linux, so it’s clearly an OS-level thing.

Chrultrabook’s hardware compatibility chart mentions that TB/USB4 requires some systemd service, but the setup and post-install guides don’t mention it.

As my test the Linux kernel on Linux 6.12.x is the wrong thing because the Fedora 41 is could not connect with Thunderbolt and other data connect at the usb4/thunderbolt connecter .

So the only way is hope Debian update to a modern Linux kernel. (I’m not a native English speaker,so there will some mistick on my test.)