I2C access problem on the buses i2c-3, i2c-5 and i2c-6

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
,
8

The ddc channel for HDMI is by default disabled. So you need to manually open it with below method.

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