Tailscale Won't start with Custom Kernel

[Renkin42]

I'm trying to set up tailscale on my system. It works if I use the distribution kernel, but that's actually causing video issues on my laptop. Using my modified config in /etc/kernel/config.d/ however Tailscale won't start. Running sudo tailscale login i get

[pietinger]

[Renkin42]

[pietinger]

[Renkin42]

Thank you for that guide, I’ll definitely be giving it a good look-over! I’m fairly confident it’s kernel-related since disabling my custom configuration and re-emerging gentoo-kernel did seemingly fix the issue (but introduced other unrelated ones while making the compile over 5x longer). When I get home I’ll try deleting those lines you pointed out, and then try your netfilter module suggestion. Failing that I’ll see if I can grab a complete config and go from there.

[Renkin42]

All right, sadly no luck with the lines you pointed out or enabling everything in netfilter.
Here is my .config in full now: https://gist.github.com/Renkin42/5b46490a832cd8bbdfda0dc283793b57
And here is the output of grep "tailscale" /var/log/* : https://gist.github.com/Renkin42/de66ccf039154caec15a77b640690bb3
Not seeing much of interest, just the service exiting with code 1 and being respawned over and over until it gives up. Not finding any info on other logs, their docs just say to check journalctl, ie systemd which I don't have

[pietinger]

It is stopping here: