An update (posted on Issue tracker as well):
I spent several hours yesterday and today, playing around with bios
settings on both machines.
It seems there is no much hope with Asus X399 motherboard, even
switching to bios-Legacy mode and disabling ACPI.
I had more success with the HP Z620 (late 2012 model).
By setting bios SATA to IDE compatibility mode, the OpenIndiana Live USB
That system is running a Xeon E5 1650, with no builtin graphics, but it
has an nvidia GeForce card.
After a few seconds, lightdm fails, and issue message "default failed:
transitioned to maintenance". Then I am dropped in openindiana console
Still, I finally got to boot!
But, there is another issue:
Unfortunately, when I booted the Live USB image, it forced the HP Z620
worstation, which was fine booting FreeBSD via UEFI, to Bios-legacy
mode, effectively botching the boot disk.
Mind you, I was not installing it. Just the mere running of the Live USB
image changed the boot setup to legacy mode and leaving a boitched
Unfortunately, we do not have any non-UEFI machines here, so I will need
to wait to play more with OI when UEFI install image will be available.
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