[Bug 231923] [pci] AMD Ryzen X370 chipset PCIe bridge failed to allocate initial memory window

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231923

--- Comment #2 from Greg V <greg at unrelenting.technology> ---
Looks like hw.pci.enable_io_modes=0 fixes this.

(Was discovered when installing an RX Vega GPU — that was actually panicking
with "next resource mismatch", so I went to fiddle with pci tunables.)

So this might be some weird misconfiguration in firmware.

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