Thunderbolt PCIe Device ASPM issue

Hello. 

We are trying to use a Thunderbolt to PCI board on a Lattepanda, with our PCI card connected to it.

However, our PCI card is repeatedly encountering power management-related issues, so we would like to inquire about this.

When checking dmesg, we see the following message.

  - Unable to change power state from D3cold to D0, device inaccessible

To resolve this issue, we have disabled IOMMU settings in the BIOS.
Added the following kernel options in GRUB
  - pcie_aspm=off
  - pcie_port_pm=off
  - intel_iommu=off
 

Despite these changes, the issue persists.

Do you have any suggestions on how to proceed?

I would appreciate it if you could review this.

Thank you.