Issue Running ddcutil on Yocto Image (Arm)

[rahulraja-7801]

I tried adding ddcutil to yocto image and ran the command, but it reports “No displays found.”

root@osm-imx93:~# ddcutil detect No displays found. Is DDC/CI enabled in the monitor's on screen display? Run "ddcutil environment" to check for system configuration problems. Could you please advise on how to resolve this issue?

I have confirmed that DDC/CI is enabled on the monitor.

Thank you for your support.

Thanks & Regards, Rahul R

[rockowitz]

As per the Guidelines for Issues (#241 ), please submit the output of sudo ddcutil interrogate as an attachment. I am not clairvoyant.

[rahulraja-7801]

Hi,

I have attached the file for your reference.

ddcutil_interrogate.txt

Thanks & Regards, Rahul R

[rockowitz]

The i2cdetect output shows that I²C slave address X37 is unresponsive. DDC communication is not possible. And even though slave address x50 (EDID) is responisive, reading the EDID using slave address x50 fails. /sys/class/drm is populated in some non-standard driver specific way.

The version of ddcutil you are using, 1.1.0, is over 4 years old.

[rahulraja-7801]

Thank you for the update. Given that the current version of ddcutil in use is 1.1.0 and it's over 4 years old, could this be contributing to the issue? Would upgrading to the latest version potentially resolve the problem? Also, could you please confirm the latest stable version of ddcutil available?

[rockowitz]

As I said, utility program i2cdetect, which is not part of ddcutil, shows that DDC communication is not possible. Perhaps that can be fixed, but that is a video driver issue.

For ddcutil releases information, see the web site home page or the Releases tab.