Sunday, March 05, 2023

Re: Troubleshooting tips for when installed kernel hangs on boot, but not bsd.rd

> I also got other tips outside the email list, and this got me going
> down a rabbit hole within the BIOS. After clearing nvram, and
> resetting to defaults, somehow this got it to boot up just fine. I'm
> part relieved that it works, and part concerned that I have no idea
> why, so I've spent the weekend slowly going through all change
> permutations in bios to find what's not working. It turns out that
> disabling com2 specifically (out of 0-3) , breaks... something... on
> BSD-like systems at least. I'm trying to narrow it down and I'll
> share in the bug I opened once I have useful info, even if it's
> naughty hardware.

I'm glad you got yours to work like I got mine to work. My motherboard,
a Supermicro X13SAE, only has one COM port. Disabling it caused similar
issues as disabling COM2 on yours. Interestingly, I was at least able to
boot into single-user mode though, so the bug affected you worse than it
did me.

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