https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264172
--- Comment #15 from Alexander Motin <m...@freebsd.org> ---
For "verbose dmesg" you should enable it during boot, either via option in
loader menu or via setting boot_verbose="YES" in loader.conf. After that
regular `dmesg` will be much more verbose.
Looking on new `pciconf` output I see in 13.0:
cap 05[60] = MSI supports 2 messages, vector masks
, but in 13.1:
cap 05[60] = MSI supports 2 messages, vector masks enabled with 1
message
, that means introduced PCIe hot-plug support, just as I have guessed. You may
try to block it with the loader tunable I've posted before. Otherwise I am not
sure what OS should do about it, since it just handles what is reported by
hardware.
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