lspci

Overview

The lspci command displays information about PCI buses in the system and devices connected to them. It’s essential for hardware identification and troubleshooting.

Syntax

lspci [options]

Common Options

Option Description
-v Verbose output
-vv Very verbose output
-k Show kernel drivers
-mm Machine-readable output
-t Show bus tree
-s [[[[<domain>]:]<bus>]:][<device>][.[<func>]] Show specific device
-d [<vendor>]:[<device>] Show specific vendor/device
-i <file> Use specified ID database

Key Use Cases

  1. Hardware identification
  2. Driver troubleshooting
  3. System inventory
  4. Hardware compatibility checks
  5. Performance analysis

Examples with Explanations

Example 1: Basic Device List

lspci

Shows basic information about PCI devices

Example 2: Detailed Information

lspci -v

Shows verbose information including driver details

Example 3: Kernel Modules

lspci -k

Shows kernel modules used by each device

Understanding Output

Standard output format:

Bus:Device.Function Class: Vendor Device (Rev XX)

Example:

00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)

Common Usage Patterns

  1. Check graphics card:

    lspci | grep -i vga

  2. View network interfaces:

    lspci | grep -i ethernet

  3. Check specific device details:

    lspci -s 00:02.0 -v

Performance Analysis

  • Minimal system impact
  • Quick hardware inventory
  • Driver-hardware relationship
  • Resource allocation
  • IRQ assignments

Additional Resources