Control brightness of display using ddcutil

Autonomous Machines Jetson & Embedded Systems Jetson Xavier NX
1

Hey i am using xavier agx DK , I am using a mimo um-1080ch-of which is connected through HDMI . I want to control the brightness of the screen but ddcutil doesnt find any display connected

3 
echo 1 > /sys/kernel/debug/tegra_hdmi/ddc_power_toggle

Run this and try the ddcutil again.

4

Hi @WayneWWW ,
My sys/kernel/debug is an empty directory so cant really set this data

5

actually its a permission denied error

6

You need to run as a root.

7

hi @WayneWWW ,
I was running it as root ,but i found the solution here for it Permission denied on /sys/kernel/debug its working now thanks for your help

8

Actually, if you need to follow that command to make it work… you better check your installation for rootfs and BSP…

IMO this should not be needed.

9

hi @WayneWWW ,
okay i will look into it.