Xrandr Command - Linux Display Configuration Tool - cmd Cheatsheets

The xrandr command is a powerful utility for configuring screen resolutions, output connections, and monitor arrangements in Linux environments that use the X Window System. It allows users to dynamically change screen settings without needing to restart the graphical session.

Configure Display Outputs

xrandr is essential for managing multiple monitors, setting primary displays, and adjusting refresh rates. Understanding its syntax is key to optimizing your desktop workspace.

Enable HDMI Output

To enable an HDMI output and automatically detect the best resolution, use the --auto option. This is a common first step when connecting a new display.

# To enable HDMI2 output with maximal resolution:
xrandr --output HDMI2 --auto

Set Specific Resolution

If you need to enforce a particular screen resolution, you can specify it using the --mode option. This is useful for compatibility or when automatic detection isn't ideal.

# To enable HDMI2 output with specific resolution:
xrandr --output HDMI2 --mode 1280x800

Arrange Monitors

Positioning multiple monitors relative to each other is easily achieved with xrandr. Options like --right-of, --left-of, --above, and --below help create a seamless multi-monitor setup.

# To enable HDMI2 output next to HDMI1 output:
xrandr --output HDMI2 --auto --right-of HDMI1

Disable Output

When a display is no longer needed, you can disable it to save power or simplify your setup.

# To disable HDMI2 output:
xrandr --output HDMI2 --off

Further Display Management

xrandr offers many more options for advanced users, including setting primary displays, mirroring screens, and configuring refresh rates. For detailed information, consult the official documentation.

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