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cheatsheet-tldr/tldr/linux/xbacklight
2025-04-26 00:18:47 +00:00

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---
syntax: markdown
tags: [tldr, linux]
source: https://github.com/tldr-pages/tldr.git
---
# xbacklight
> Utility to adjust backlight brightness using the RandR extension.
> More information: <https://manned.org/xbacklight>.
- Get the current screen brightness as a percentage:
`xbacklight`
- Set the screen brightness to 40%:
`xbacklight -set {{40}}`
- Increase current brightness by 25%:
`xbacklight -inc {{25}}`
- Decrease current brightness by 75%:
`xbacklight -dec {{75}}`
- Increase backlight to 100%, over 60 seconds (value given in ms), using 60 steps:
`xbacklight -set {{100}} -time {{60000}} -steps {{60}}`