Command Overview
ddcutil has the following commands:
| Primary Command | Function |
|---|---|
| detect | report monitors detected |
| capabilities | report a monitor's capabilities string |
| getvcp feature-code-or-group | report a single VCP feature value, or a group of values |
| setvcp feature-code new-value | set a single VCP feature value |
| vcpinfo (feature-code-or-group) | list VCP features codes that ddcutil knows how to interpret |
| dumpvcp filename | save color related VCP feature values to a file |
| loadvcp filename | restore color related VCP feature values from a file |
| scs | execute DDC/CI Save Current Settings operation |
| Secondary Command | Function |
|---|---|
| environment | explore the ddcutil installation environment (other than USB) |
| usbenvironment | explore USB aspects of the ddcutil installation environment |
| probe | report the capabilities string and probe the features of a single monitor |
| interrogate | collect maximal information for problem diagnosis |
| chkusbmon /dev/hiddevN | used by udev rules to test if a USB device represents a monitor |
A feature code is specified as a hexadecimal number, with or without a leading "x". For example,
to the current brightness value:
$ddcutil getvcp 10
A feature-group is a named set of features. For example:
$ ddcutil getvcp all
$ ddcutil getvcp color
If more than one monitor is attached, the desired monitor can be specified
using any of several options. The most useful are:
--display <display number>
--bus <i2c bus number>
To see a list of all attached monitors and their associated identifiers:
$ ddcutil detect
These sections document ddcutil commands and options in detail:
The --help option provides a summary of commands and options, as does the man page:
$ ddcutil --help
$ man 1 ddcutil
Command examples: