jmelan

I am just posting a possible fix for what seems like a common problem with this board in case it helps others. This is an older thread but seems to be the best resource for this motherboard that I can find. I am currently using proxmox (9.2), but seems like the fix should work for unraid as well. I saw multiple posts about devices not being identified and having to switch around pci slots. Had the same issue after adding a video card (arc a310), x520 (via M.2), HBA, dual Coral TPU, and PCIe to NVME x4 adapter (PLX chip). Removing some devices would lead to another working. Just seemed like the board could not handle all of the pci slots being populated. The dual Coral TPU especially, or another device was not being assigned a bus number (with lspci -tv), and as a result was not accessible or showing up in lspci. adding "pci=realloc,nocrs,assign-busses" to grub fixed the issue for me. "assign-busses" was the key to get everything working for me, not sure if the others are necessary or not. All devices are now identified in lspci and working. I have added ReBarUEFI to the motherboard in the meantime (for an arc a310), but this problem predated that change, and it did not fix the issue. However, I cannot exclude the possibility that both ReBarUEFI and "assign-busses" together allowed for the additional devices to be recognized and given adequate address space. Other settings: EFI only boot only EFI or disabled option ROMs, no legacy Above 4G decoding enabled CSM off