[Bug 272507] Devices fails to initialize on some AMD X670E(xtreme) based motherboards

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272507

Cameron <cam@neo-zeon.de> changed:

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--- Comment #27 from Cameron <cam@neo-zeon.de> ---
I had an issue with my Asus Crosshair x670 Extreme where I originally couldn't
boot FreeBSD from the SATA disk where it was installed... Unless I went into
the BIOS and selected the drive via "boot override". Eventually, I was able to
fix the issue by disabling fast boot. 

Otherwise... FreeBSD worked perfectly on this board until BIOS 1709.

Unfortunately, you can't downgrade from 1709... But as of 1709, USB and
ethernet stopped working entirely... Some new BIOS betas since then have gotten
USB working again, but not the onboard i225 ethernet. I've worked around this
by installing an Intel x550-T2 NIC... But the system is unstable, and seems
slower... The slowness might be related to disk IO? I'm not sure. The SATA
Samsung 860 Pro I'm using is reported as 96% by Samsung Magician.

Interestingly, downgrading back to 1709, USB still works... I suspect that
downgrading to the older BIOS version doesn't downgrade some of the other
firmware. My guess is that while the BIOS is downgraded to 1709, that the AGESA
is still more recent than what shipped with 1709.

I ended downgrading to 1709 because it's less unstable in Windows/Linux and
found it now hilariously works with FreeBSD now too. But It's still a bit
unstable and I still have this weird slowness in FreeBSD.

So while I don't have quite the same bug, this might be useful as I do think
this is related. Probably today, I'll finally file a separate bug.

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