Make sure Video Output is going to AST2500 / BMC and not to discreet Graphics card past Grub & onwards?

J

jbattermann

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Jul 26, 2021
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Good evening,

I have just put together a new system on which I intend to run Proxmox on, however I have one problem: the board comes with a BMC and an AST2500 based graphics "card" on board, and I am going to / want to use a real (Nvidia) graphics card for one of the future VMs.

In the system bios the integrated/"Onboard Graphics card" is selected as primary GPU, however I can see everything up to the proxmox bootmanager / grub on both screens (the BMC virtual/remote one but also the one I had plugged in to the graphics card) and past grub, graphics are only output to the Nvidia-connected monitor.. the AST2500 "screen" shows the last grub message before booting into the Proxmox system.

So I -assume- there's something I did wrong or is missing that might diverge the output to the non-primary (bios/system wise) graphics card.

Does anyone have an idea where to look / what to do to make sure the AST2500 graphics card and its output -is- being used as main output?

Thanks!
-J
 
That's basically the last I see.. all Proxmox boot messages and everything past that are output to the discreet graphics card.

1647055680577.png
 
Dunuin said:
You could blacklist the nvidia drivers like described in the wiki:
https://pve.proxmox.com/wiki/Pci_passthrough#GPU_Passthrough
Then PVE won't use/initialize the nvidia card and you can pass it through to a VM.
Click to expand...
Thanks @Dunuin for the reply! I had in fact already done that, but no change other than the boot output was looking to be a lower resolution after that :-/

The Nvidia card is already only using the vfio-pci drivers, no longer the nvidiafb & nouveau ones:

Code: 
root@jBProxmoxSecondary:~# lspci -v -s 47:00
47:00.0 VGA compatible controller: NVIDIA Corporation GA102 [GeForce RTX 3080] (rev a1) (prog-if 00 [VGA controller])
        Subsystem: ASUSTeK Computer Inc. GA102 [GeForce RTX 3080]
        Flags: fast devsel, IRQ 255, NUMA node 2, IOMMU group 51
        Memory at b2000000 (32-bit, non-prefetchable) [size=16M]
        Memory at 28060000000 (64-bit, prefetchable) [size=256M]
        Memory at 28070000000 (64-bit, prefetchable) [size=32M]
        I/O ports at 6000 [size=128]
        Expansion ROM at b3000000 [disabled] [size=512K]
        Capabilities: [60] Power Management version 3
        Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [78] Express Legacy Endpoint, MSI 00
        Capabilities: [b4] Vendor Specific Information: Len=14 <?>
        Capabilities: [100] Virtual Channel
        Capabilities: [250] Latency Tolerance Reporting
        Capabilities: [258] L1 PM Substates
        Capabilities: [128] Power Budgeting <?>
        Capabilities: [420] Advanced Error Reporting
        Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
        Capabilities: [900] Secondary PCI Express
        Capabilities: [bb0] Physical Resizable BAR
        Capabilities: [c1c] Physical Layer 16.0 GT/s <?>
        Capabilities: [d00] Lane Margining at the Receiver <?>
        Capabilities: [e00] Data Link Feature <?>
        Kernel driver in use: vfio-pci
        Kernel modules: nvidiafb, nouveau

47:00.1 Audio device: NVIDIA Corporation GA102 High Definition Audio Controller (rev a1)
        Subsystem: ASUSTeK Computer Inc. Device 87b0
        Flags: fast devsel, IRQ 255, NUMA node 2, IOMMU group 51
        Memory at b3080000 (32-bit, non-prefetchable) [disabled] [size=16K]
        Capabilities: [60] Power Management version 3
        Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [78] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [160] Data Link Feature <?>
        Kernel driver in use: vfio-pci
        Kernel modules: snd_hda_intel
 
jbattermann said:
Thanks @Dunuin for the reply! I had in fact already done that, but no change other than the boot output was looking to be a lower resolution after that :-/

The Nvidia card is already only using the vfio-pci drivers, no longer the nvidiafb & nouveau ones:

Code: 
root@jBProxmoxSecondary:~# lspci -v -s 47:00
47:00.0 VGA compatible controller: NVIDIA Corporation GA102 [GeForce RTX 3080] (rev a1) (prog-if 00 [VGA controller])
        Subsystem: ASUSTeK Computer Inc. GA102 [GeForce RTX 3080]
        Flags: fast devsel, IRQ 255, NUMA node 2, IOMMU group 51
        Memory at b2000000 (32-bit, non-prefetchable) [size=16M]
        Memory at 28060000000 (64-bit, prefetchable) [size=256M]
        Memory at 28070000000 (64-bit, prefetchable) [size=32M]
        I/O ports at 6000 [size=128]
        Expansion ROM at b3000000 [disabled] [size=512K]
        Capabilities: [60] Power Management version 3
        Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [78] Express Legacy Endpoint, MSI 00
        Capabilities: [b4] Vendor Specific Information: Len=14 <?>
        Capabilities: [100] Virtual Channel
        Capabilities: [250] Latency Tolerance Reporting
        Capabilities: [258] L1 PM Substates
        Capabilities: [128] Power Budgeting <?>
        Capabilities: [420] Advanced Error Reporting
        Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
        Capabilities: [900] Secondary PCI Express
        Capabilities: [bb0] Physical Resizable BAR
        Capabilities: [c1c] Physical Layer 16.0 GT/s <?>
        Capabilities: [d00] Lane Margining at the Receiver <?>
        Capabilities: [e00] Data Link Feature <?>
        Kernel driver in use: vfio-pci
        Kernel modules: nvidiafb, nouveau

47:00.1 Audio device: NVIDIA Corporation GA102 High Definition Audio Controller (rev a1)
        Subsystem: ASUSTeK Computer Inc. Device 87b0
        Flags: fast devsel, IRQ 255, NUMA node 2, IOMMU group 51
        Memory at b3080000 (32-bit, non-prefetchable) [disabled] [size=16K]
        Capabilities: [60] Power Management version 3
        Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [78] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [160] Data Link Feature <?>
        Kernel driver in use: vfio-pci
        Kernel modules: snd_hda_intel
Click to expand...
Did you ever fix this? Mine is doing the same thing with drivers blacklisted.
 
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