2025-03-14 21:59:59 -06:00
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# ddcutil
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> Control the settings of connected displays via DDC/CI.
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2025-09-14 18:48:49 -06:00
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> This command requires the kernel module `i2c-dev` to be loaded.
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> See also: `modprobe`.
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2025-12-16 10:20:31 -07:00
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> More information: <https://www.ddcutil.com/commands/>.
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2025-03-14 21:59:59 -06:00
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- List all compatible displays:
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2026-02-18 06:55:01 -07:00
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`ddcutil {{[det|detect]}}`
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2025-03-14 21:59:59 -06:00
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2026-02-18 06:55:01 -07:00
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- Query the first compatible display for capabilities:
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2025-03-14 21:59:59 -06:00
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2026-02-18 06:55:01 -07:00
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`ddcutil {{[cap|capabilities]}}`
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2025-03-14 21:59:59 -06:00
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2026-02-18 06:55:01 -07:00
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- Change the brightness (option `10`) of display 1 to 50%:
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2025-03-14 21:59:59 -06:00
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2026-02-18 06:55:01 -07:00
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`ddcutil {{[-d|--display]}} 1 {{[set|setvcp]}} 10 50`
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- Increase the contrast (option `12`) of display 1 by 5%:
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`ddcutil {{[-d|--display]}} 1 {{[set|setvcp]}} 12 + 5`
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- Change the display source (option `60`) of a display:
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`ddcutil {{[-d|--display]}} {{1}} {{[set|setvcp]}} 60 0x{{0f}}`
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2025-03-14 21:59:59 -06:00
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- Read the settings of display 1:
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2026-02-18 06:55:01 -07:00
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`ddcutil {{[-d|--display]}} 1 {{[get|getvcp]}} ALL`
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