Comments (2)
Your best bet is to make changes using the OSD, and use the output of ddcutil getvcp scan --brief to see what has changed.
A more precise way to figure out what is needed is to sniff the I2C bus while making changes from Samsung's Windows application. See Reverse Engineering Proprietary DDC Extensions.
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Well I made a bunch of changes to inputs using the OSD and ran the ddcutil getvcp command after each change. Captured the results and compared there were no differences. Although I am running the command and capturing the changes from an rpi zero attached to the 2nd HDMI interface. Not sure that matters though as I am able to query and change some inputs from that device.
Guess it is on to read the reverse engineering guide.
Thanks!
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Related Issues (20)
- TEMPORARY ALTERNATIVE REPOS HOT 1
- Does this work with Alienware AW3423DW?
- libddcutil ddca_get_display_info_list2 returns DDCRC_OTHER (-3022) HOT 2
- libddcutil behaves differently/fails after a hotplug compared to ddcutil HOT 2
- Bricked LG Monitor HOT 6
- Ubuntu 24.04 LTS prebuild package HOT 2
- Unable to set input source on Gigabyte M27Q HOT 2
- Failed assertion in check_video_adapters_list_implements_drm HOT 1
- Small suggestion for ddcutil documentation on the website HOT 1
- Dell UltraSharp 2209WAf: DDC communication failed HOT 8
- Ubuntu and Debian packages in OBS are missing libddcutil.so.x.x.x HOT 2
- Enhancement - consider packaging module loading HOT 2
- "Keeping adjust sleep multiplier" warning shown many times HOT 1
- Monitor resets many times on boot after new udev rule installed HOT 44
- System cannot enter S0ix sleep after running ddcutil detect HOT 8
- No (DisplayLink) displays found on 2.1.4, but works on 2.0.0 HOT 6
- ddcutil 2.1.4-1: DDC communication failed HOT 3
- [debian] updating linux-image pkg fails due to ddcutil dkms module failure HOT 2
- Cannot get capabilities: Maximum DDC retries exceeded. HOT 8
- Add an option to return the capabilities for a specific feature. HOT 4
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