Open fritz-m-h opened 10 months ago
Additionally, the other HDMI port which supports only 30Hz does support DDC control. Weird, isn't it?
Welcome to the world of Nvidia's proprietary driver. Tty using the special settings described at Special Nvidia Driver Settings.
Thank you for reply! Unfortunately, the second PC I tested it with has an Intel Graphics Card and the same issue :/
You appear to be having data problems. The only thing that ddcutil can do at that point is increase its sleeps between operations. Try using option --sleep-multiplier 2.0.
That said, you can try to glean more detail on the errors. Option --ddc reports DDC packet data errors. Options --trcfunc ddc_write_read_with_retry --trcfunc ddc_write_read will dump out voluminous trace information at the layer where the data errors are detected. Use them with a simple command such as detect.
For example:
ddcutil detect --ddc --trcfunc ddc_write_read_with_retry --trcfunc ddc_write_read
Please excuse the belated reply, I executed $ ddcutil detect --ddc --trcfunc ddc_write_read_with_retry --trcfunc ddc_write_read --sleep-multiplier 2.0
and unfortunately got similar errors:
The DDC get feature reply packets contain garbage that's not even close to what is expected. This will be more apparent if you just use option --ddc. That DDC communication works on the slower 30hz HDMI connector suggests its an issue in the monitor's DDC implementation.
Hey,
this is my first post here so I hope to do everything right and so on.
As you can see in the attached file, I own two almost identical Samsung U32J59x and one of them is connected to my PC via HDMI and the other one via DisplayPort. Additionally, I tested the one of them which I normally connect via DisplayPort on a different PC via HDMI and the HDMI results always show, that DDC was not supported by the screen, while I successfully tested the adjustment of the brightness of the DisplayPort screen. Unfortunately I only have one DisplayPort connector on my PC, so I somehow have to deal with HDMI, and I don't even know, if it's my fault or not. Could you please consider helping me in any way? Thank you very much.
interrogate.txt