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Raspberry Pi 4 Not Acccessible After a Soft Boot

Every time I update my Pi, whether it be an kernel update or due to something goofy I do, it refuses to be accessible via ssh after it boots back up.
And everytime I bring it back to my desk, it just works.
And when I put it back into its niche, by the door, it continues to work.
But inevitably, sooner or later, comes a reboot, and we’re back to being inaccessible.
No ssh, no plex, no network.

The other Pi, my old 3 series, keeps chugging along like a champ in the meanwhile.
So this was driving me up the wall.
So I got to thinking, what the issue could be.
And then I realised, I was running the 64 bit edition of the Raspberry Pi OS.
And then I got to thinking, hmm, this is not a mature os. What if, it might be buggy? Or what if, something I do, is tripping it up the wrong way?
Logically then, that meant the network stack, or the network interface, or the port itself.
Because everytime I came in, to my desktop, I connect it to a switch (that connects to my upstream router).
And then when I take it back, it changes back to connecting it to the router directly.

So the next time this happened, I put the Pi off, turned the router off and on and then put the Pi back on.
And that did the trick.
I tried it again this morning, when the Pi went offline, after another update. The heuristic still holds!
I’m sure, I could go digging further to find the root cause, (dhcp release renew not happening right?), this justs lets me get on with my life and I’m happy :)


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