No display of CLI proxmox pve

[Snatsbats]

So i've successfully configured PCI passthrough of my Nvidia GPU to my VM. now i still want to use the Proxmox Host CLI locally via vga output on the server. of course i cant use the nvidia GPU for this since its been passthrough to the VM. i also cant use the motherboard video output since i have an AMD CPU without Integrated graphics.As a solution i thought installing a second gpu in my second x16 slot to see the vga output of the host. unfortunately i won't get any signal. it seems proxmox selects the first gpu as the primary GPU for output. i didnt passthrough the second card to a VM. i also didnt block the GPU in the Host as this wasnt necessary for passthrough apparently.

this is the output i get from the command 'root@proxmox:~# lspci -k | grep -A 2 -i "VGA" ':

03:00.0 VGA compatible controller: NVIDIA Corporation GK107 [GeForce GT 640] (rev a1)

        Subsystem: CardExpert Technology GK107 [GeForce GT 640]

        Kernel modules: nvidiafb, nouveau

--

06:00.0 VGA compatible controller: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] (rev a1)

        Subsystem: ZOTAC International (MCO) Ltd. GP102 [GeForce GTX 1080 Ti]

        Kernel driver in use: vfio-pci

Does anyone know how this could be fixed. and if i can change the GPU proxmox uses for cli without affecting the GPU passthrough of my first GPU?

 

[LnxBil]

On some machines, you can choose in the bios which gpu is "the first", maybe have a look there.
Another option is to swap the pci slots of the gpus if they're the same.

 

[Snatsbats]

Oh i forgot to mention, i cant set this in the BIOS. The first slot is x16 with 16x supported. the second slot is 16x but only 4x supported. so i cant swap them.

 

[leesteken]

Oh i forgot to mention, i cant set this in the BIOS. The first slot is x16 with 16x supported. the second slot is 16x but only 4x supported. so i cant swap them.

Sometimes enabling or disabling CSM in the BIOS works. Otherwise, you'll need to switch to a motherboard that does allow selecting the boot PCIe slot or has onboard graphics, or switch to a CPU with integrated graphics, or switch to a primary GPU that can be switch back to the Proxmox host when the VM is not running.