Re: SGI O2 unable to boot 9.0+

On Mon, Jun 24, 2024 at 7:10 PM Mike Shields <[email protected]> wrote:
>
> Ah, you got my hopes up!
>
> But unfortunately, this makes it freeze even before the first line of kernel output! (Maybe that’s a clue?)
>
> I built a 10.0 system on an arm64 system to use as a faster platform to cross-compile kernels on for testing (I don’t fancy building kernels at 200MHz if I’m going to do it many times). I’ll follow Warner’s suggestion and start with 8.3 + some interval and see if I can find the breaking point.
>

Yes, that's one of the ways to try to identify at least the commit
causing the issue, but might be a bit tedious exercise. I would
suggest to put old kernel to the new image and see if it still boots
to rule out some bootloader issues (not sure how sgimips works here,
but had experience with x86 then the problem was a bootloader, not a
kernel). You can follow sys/sys/param.h 8.99.x version commits for
example (between one version can be lots of commits but, it may help
to narrow the search).