It was 100% bios settings. I need to shutdown and photograph them for reference.
There a "magic" memory mode, that on by default, that is like dos days games that messes up ventura big time.
Turning it off, everything is good.
The whole gpu is passthru completely to the guest, actually I have a separate usb3 card that is passthru as well.
So my keyboard/mice/sound/camera has zero delays. Im running a really fast mac on intel.
I love it. The upgrade to 8 was my complication. And I had forgot about the bios changes.
Promox would be even better if they would default all the needed for gpu passthru. There one time changes, but a small debian module could fix those. As there well known.
I have a script even to switch me from mac to windows. Full gpu accelarated gaming on 3 screens
I also run a butch of dev vm on the sides.
Hardware choices for osx are key, but lots of things out there, and I've started a presentation on my config.
$120 motherboard, 192gig of ram, and 4tb of pcie gen 4 ssd makes a great machine.