If possible, remove all PCI devices except for the one you are using. Also, list PCI devices (when all connected) which are working as expected. Additionally, what do you see for the verbose tree view?
sudo lspci -t -v
If possible, remove all PCI devices except for the one you are using. Also, list PCI devices (when all connected) which are working as expected. Additionally, what do you see for the verbose tree view?
sudo lspci -t -v