传送门 ddcctl

使用方式

1.下载ddcctl.zip并解压
2.cd到目录
3.make install
4.make CCFLAGS=-DOSD clean ddcctl
5.ddcctl -d 1 -i 17 设置显示器1为hdmi接口1
6.ddcctl -d -b 50 就可以把亮度调到50

更多api参考传送门
以下为全部命令

ddcctl  -d <1-..>  [display#]
    -w 100000  [delay usecs between settings]

----- Basic settings -----
    -b <1-..>  [brightness]
    -c <1-..>  [contrast]
    -rbc       [reset brightness and contrast]

----- Settings that don't always work -----
    -m <1|2>   [mute speaker OFF/ON]
    -v <1-254> [speaker volume]
    -i <1-18>  [select input source]
    -p <1|2-5> [power on | standby/off]
    -o         [read-only orientation]

----- Settings (testing) -----
    -rg <1-..>  [red gain]
    -gg <1-..>  [green gain]
    -bg <1-..>  [blue gain]
    -rrgb       [reset color]

----- Setting grammar -----
    -X ?       (query value of setting X)
    -X NN      (put setting X to NN)
    -X <NN>-   (decrease setting X by NN)
    -X <NN>+   (increase setting X by NN)