for some reason i don't get any signal-loss event when pulling the plug.
i captured a frame with no video signal on my own, and found out, that RGB values are 353535 or in hexadecimal 232323. on my system it is not a "shade of blue" but gray.
did i miss somthing? do i need some extra character? (maybe #?)
my monitor is set to grayscale, but the jpgs are outlined with colors... maybe that's the problem? is the signal loss detection started before converting grayscale images into coloured images?
The numbers for the colour needs to be specified in hex, so just 232323 is what you would need but I assume you have tried that.
If you have the colourise jpegs option on then even greyscale images will be converted into the normal rgb colourspace. This doesn't usually make any difference but perhaps it's introducing a subtle change into the image and slightly shifting the colour you are sampling. Try switching the ZM_COLOUR_JPEG_FILES option off to see if you see a different colour.
And before anyone posts to mention this, yes I have just realised that I've managed to hide this particular bit of config in 1.22.0 by creating a category that isn't displayed
You will have to change it directly by going into mysql and doing update
Config set Value = 0 where Name = "ZM_COLOUR_JPEG_FILES";
however I'm not sure if that will make a whole lot of difference. You can give it a go though, and use zmu -i to dump an image directly from the shared memory.
