[SOLVED] In Proxmox VE 8.1.4 intel i226-v PCI passthrough VM cannot start. Attempted to add pcie_port_pm=off to Grub

[For_Pugss]

I followed some tutorials to set up passthrough for the network card and added the "pcie_port_pm=off" parameter in Grub, but still cannot start the VM.

GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt pcie_port_pm=off"

View through dmesg

[   29.317702] igc 0000:08:00.0 enp8s0: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
[   29.318067] vmbr0: port 1(enp8s0) entered blocking state
[   29.318089] vmbr0: port 1(enp8s0) entered forwarding state
[   34.560328] bpfilter: Loaded bpfilter_umh pid 907
[   34.561859] Started bpfilter
[   44.857354] kvm[941]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
[   66.021868] igc 0000:05:00.0 enp5s0: PHC removed
[   66.266695] vfio-pci 0000:05:00.0: Unable to change power state from D3hot to D0, device inaccessible
[   66.329059] vfio-pci 0000:05:00.0: Unable to change power state from D3cold to D0, device inaccessible
[   67.057435] vfio-pci 0000:05:00.0: timed out waiting for pending transaction; performing function level reset anyway
[   68.305406] pcieport 0000:00:1c.6: broken device, retraining non-functional downstream link at 2.5GT/s
[   69.305362] pcieport 0000:00:1c.6: retraining failed
[   69.305367] vfio-pci 0000:05:00.0: not ready 1023ms after FLR; waiting
[   70.353354] vfio-pci 0000:05:00.0: not ready 2047ms after FLR; waiting
[   72.657281] vfio-pci 0000:05:00.0: not ready 4095ms after FLR; waiting
[   77.009139] vfio-pci 0000:05:00.0: not ready 8191ms after FLR; waiting
[   85.456817] vfio-pci 0000:05:00.0: not ready 16383ms after FLR; waiting
[  103.888203] vfio-pci 0000:05:00.0: not ready 32767ms after FLR; waiting
[  138.702975] vfio-pci 0000:05:00.0: not ready 65535ms after FLR; giving up
[  139.742958] pcieport 0000:00:1c.6: broken device, retraining non-functional downstream link at 2.5GT/s
[  140.742906] pcieport 0000:00:1c.6: retraining failed
[  141.998878] pcieport 0000:00:1c.6: broken device, retraining non-functional downstream link at 2.5GT/s
[  143.006832] pcieport 0000:00:1c.6: retraining failed
[  143.006837] vfio-pci 0000:05:00.0: not ready 1023ms after bus reset; waiting
[  144.046788] vfio-pci 0000:05:00.0: not ready 2047ms after bus reset; waiting
[  146.126724] vfio-pci 0000:05:00.0: not ready 4095ms after bus reset; waiting
[  150.478595] vfio-pci 0000:05:00.0: not ready 8191ms after bus reset; waiting
[  158.926273] vfio-pci 0000:05:00.0: not ready 16383ms after bus reset; waiting
[  175.568540] vfio-pci 0000:05:00.0: not ready 32767ms after bus reset; waiting
[  210.383390] vfio-pci 0000:05:00.0: not ready 65535ms after bus reset; giving up
[  210.387140] vfio-pci 0000:05:00.0: Unable to change power state from D3cold to D0, device inaccessible
[  211.979150] tap100i0: entered promiscuous mode
[  212.016258] vmbr0: port 2(fwpr100p0) entered blocking state
[  212.016263] vmbr0: port 2(fwpr100p0) entered disabled state
[  212.016283] fwpr100p0: entered allmulticast mode
[  212.016349] fwpr100p0: entered promiscuous mode
[  212.016404] vmbr0: port 2(fwpr100p0) entered blocking state
[  212.016406] vmbr0: port 2(fwpr100p0) entered forwarding state
[  212.023614] fwbr100i0: port 1(fwln100i0) entered blocking state
[  212.023620] fwbr100i0: port 1(fwln100i0) entered disabled state
[  212.023638] fwln100i0: entered allmulticast mode
[  212.023675] fwln100i0: entered promiscuous mode
[  212.023707] fwbr100i0: port 1(fwln100i0) entered blocking state
[  212.023709] fwbr100i0: port 1(fwln100i0) entered forwarding state
[  212.030461] fwbr100i0: port 2(tap100i0) entered blocking state
[  212.030466] fwbr100i0: port 2(tap100i0) entered disabled state
[  212.030485] tap100i0: entered allmulticast mode
[  212.030542] fwbr100i0: port 2(tap100i0) entered blocking state
[  212.030545] fwbr100i0: port 2(tap100i0) entered forwarding state
[  212.713863] vfio-pci 0000:05:00.0: Unable to change power state from D3cold to D0, device inaccessible
[  212.713959] vfio-pci 0000:05:00.0: Unable to change power state from D3cold to D0, device inaccessible
[  212.714134] vfio-pci 0000:05:00.0: Unable to change power state from D3cold to D0, device inaccessible
[  213.455291] vfio-pci 0000:05:00.0: timed out waiting for pending transaction; performing function level reset anyway