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In Linux, the lspci command lists all the devices in my laptop (including AGP, USB, SATA, SCSI, bridges, ethernet, etc.). The man lspci command gives me this information:

lspci - list all PCI devices

What are PCI devices? Does this relate to PCI bus (or PCI slot)?

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As the manual page of lspci says:

lspci is a utility for displaying information about PCI buses in the system and devices connected to them.

So it lists all (PCI) devices connected to the PCI bus(es). Looking at a PCI id, e.g. 03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83), the 03:00.0 is the PCI bus slot (bus:device.function), the Network controller part is the PCI slot class and the final text part is a description of the device.

Edit in response to the comment below: According to The Debian Wiki, lspci lists the PCI-like devices (AGP, PCI-Express, CardBus, Express Card, etc) that are connected to your computer. I guess it lists all devices directly connected to the north bridge, south bridge and, for more recent computers, the PCH.

Note that USB devices can be listed using lsusb and CPU information via lscpu. The lshw tool gives an even more detailed view of the hardware.

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  • AFAIK, PCI bus connects SouthBridge and peripheral controllers while AGP is connected to NorthBridge, so, why AGP is classified as a PCI device? Aug 23, 2014 at 7:07
  • Ah, I see. I updated the answer to better reflect your question.
    – ph0t0nix
    Aug 23, 2014 at 7:12

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