How does lspci find out physical slot number of a PCI device?

PC Card Slot Types pcl slot If you don't have dedicated IOMMU groups, you can try moving the card to another PCI slot Try plugging the PCI device into a different PCI pcle slot The function of the PCI slot is to allow you expand computer capabilities It is a slot for inserting expansion cards into your computer

pcle x16 slot There are 5 types of PCI slot * 5V 32-bit PCI Source: Wikipedia * 32-bit PCI-X (extremely rare