lspci is a utility for displaying information about all PCI buses in the system and all devices connected to them.
To make use of all the features of this program, you need to have Linux kernel 2.1.82 or newer which supports the /proc/bus/pci interface. With older kernels, the PCI utilities have to use direct hardware access which is available only to root and it suffers from numerous race conditions and other problems.
Tells lspci to be verbose and display detailed information about all devices.
Tells lspci to be very verbose and display even more information (actually everything the PCI device is able to tell). The exact meaning of these data is not explained in this manual page, if you want to know more, consult /usr/include/linux/pci.h or the PCI specs.
Show PCI vendor and device codes as numbers instead of looking them up in the PCI ID database.
Show hexadecimal dump of first 64 bytes of the PCI configuration space (the standard header). Useful for debugging of drivers and lspci itself.
Show hexadecimal dump of whole PCI configuration space. Available only for root as several PCI devices crash when you try to read undefined portions of the config space (this behaviour probably doesn't violate the PCI standard, but it's at least very stupid).
Bus-centric view. Show all IRQ numbers and addresses as seen by the cards on the PCI bus instead of as seen by the kernel.
Show a tree-like diagram containing all buses, bridges, devices and connections between them.
Show only devices in specified bus, slot and function. Each component of the device address can be omitted or set as
Show only devices with specified vendor and device ID. Both ID's are given in hexadecimal and may be omitted or given as
Use as PCI ID database instead of /usr/share/misc/pci.ids.
Use as directory containing PCI bus information instead of /proc/bus/pci.
Dump PCI device data in machine readable form (both normal and verbose format supported) for easy parsing by scripts.
Invoke bus mapping mode which scans the bus extensively to find all devices including those behind misconfigured bridges etc. Please note that this is intended only for debugging and as it can crash the machine (only in case of buggy devices, but unfortunately these happen to exist), it's available only to root. Also using -M on PCI access methods which don't directly touch the hardware has no sense since the results are (modulo bugs in lspci) identical to normal listing modes.
The PCI utilities use PCILIB (a portable library providing platform-independent functions for PCI configuration space access) to talk to the PCI cards. The following options control parameters of the library, especially what access method it uses. By default, PCILIB uses the first available access method and displays no debugging messages. Each switch is accompanied by a list of hardware/software configurations it's supported in.
Use Linux 2.1 style configuration access to directory instead of /proc/bus/pci. (Linux 2.1 or newer only)
Use direct hardware access via Intel configuration mechanism 1. (i386 and compatible only)
Use direct hardware access via Intel configuration mechanism 2. Warning: This method is able to address only first 16 devices on any bus and it seems to be very unrealiable in many cases. (i386 and compatible only)
Use PCI access syscalls. (Linux on Alpha and !UltraSparc? only)
Extract all information from given file containing output of lspci -x. This is very useful for analysis of user-supplied bug reports, because you can display the hardware configuration in any way you want without disturbing the user with requests for more dumps. (All systems)
A list of all known PCI ID's (vendors, devices, classes and subclasses).