[Bug 264172] nvme(4): PM9A1 NVMe Samsung 512GB no longer available with 13.1-RELEASE (was working with 13.0)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264172

--- Comment #11 from Alexander Motin <mav@FreeBSD.org> ---
With my vmd(4) driver rework in 13.1 I've tried to turn it into more or less
reasonable PCIe bridge.  I suspect that it could just fix things enough to
expose some existing issue(s), hidden otherwise.  The "Power Fault Detected"
messages you see are going from PCIe hot-plug code and are not directly relayed
to vmd(4).  You may try to set hw.pci.enable_pcie_hp=0 loader tunable to block
the PCIe hot-plug support.  You may also check your UEFI settings for any
PCI/PCIe hot-plug options.

Unfortunately I can't say more with only the information available.  For
`dmesg` I'd prefer to see verbose messages enables, while for `pciconf` I'd use
`-lvcb` arguments, or may be use `lspci -vvvv`, if can be installed, for
maximum information.

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