On 2018-07-03 03:35, Duncan wrote:
Austin S. Hemmelgarn posted on Mon, 02 Jul 2018 07:49:05 -0400 as
excerpted:
Notably, most Intel systems I've seen have the SATA controllers in the
chipset enumerate after the USB controllers, and the whole chipset
enumerates after add-in cards (so they almost always have this issue),
while most AMD systems I've seen demonstrate the exact opposite
behavior,
they enumerate the SATA controller from the chipset before the USB
controllers, and then enumerate the chipset before all the add-in cards
(so they almost never have this issue).
Thanks. That's a difference I wasn't aware of, and would (because I tend
to favor amd) explain why I've never seen a change in enumeration order
unless I've done something like unplug my sata cables for maintenance and
forget which ones I had plugged in where -- random USB stuff left plugged
in doesn't seem to matter, even choosing different boot media from the
bios doesn't seem to matter by the time the kernel runs (I'm less sure
about grub).
Additionally though, if you in some way make sure SATA drivers are
loaded before USB ones, you will also never see this issue because of
USB devices (same goes for GRUB). A lot of laptops that use connections
other than USB for the keyboard and mouse behave like this if you use a
properly stripped down initramfs because you won't have USB drivers in
the initramfs (and therefore the SATA drivers always load first).
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