Headless Mode (Stub out Primary to harvest PCIE #1 benefits) Possible (Was?/Will Be?)

[futiless]

1) I have read in the past that this was not supported; ironically I got it to work for short period of time.

2) Is it possible that the future is now and we actually have acquired this via some ramshackle experimental way or better ?

3) Can anyone save me the hassle of trying to recreate the scenario that worked (reinstalling proxmox doesn't seem to fix the problem) ie it could be at the addressing layer ? Starting to go past me and I don't understand what I did to get the supposed impossible to be possible.

4) I want to use my 4 PCIE lanes for 4 graphics card passthroughs for a serve the home type of idea. I am learning fast but am really hung up here ? ...

 

[futiless]

GRUB_CMDLINE_LINUX_DEFAULT="quiet rd.driver.blacklist=nouveau video=efifb: off intel_iommu=on pcie_acs_override=downstream pcie_aspm=off nouveau.modeset=0 intremap=no_x2apic_optout vfio-pci.ids=10de:1b80,10de:10f0"

Seems to work for me but there is far too much going on this string.... Can anyone tell me where I should trim ?

"quiet video=efifb: off intel_iommu=on pcie_aspm=off nouveau.modeset=0 intremap=no_x2apic_optout vfio-pci.ids=10de:1b80,10de:10f0"

Had to put an artificial space between : and off or ff (blue face symbol) happens
Seems to still work.. Is there a master list somewhere ?

No modprobe vfio or blacklist needed. Though for ANY 1080 GPU you need args: -cpu host,kvm=off. for it to run. That's it and i'm off it seems

Would move to solved just need to know if there is a better way yet to keep Grub CLI alive with all the goodies. Only overlap when needed ?