HDMI Display Test

EC-A1688JD4 supports standard HDMI2.0 output.

You can test the HDMI interface with the following commands:

insmod /mnt/system/ko/soph_drm.ko # Install display framework driver
systemctl stop SophonHDMI.service # Stop HDMI display interface
systemctl restart SophonHDMI.service  # Restore HDMI display interface

You can also test using modetest:

modetest -M cvitek -s 42@40:1920x1080-60@RG24

Where 42@40:1920x1080-60@RG24 should be modified according to the actual resolution of the connected monitor.