Weird, CUPS used to be one of the few software that worked mostly flawlessly out of the box. It works pretty well for me
If I'm not interested that means I'm probably not going to bring anything interesting for the discussion
Maybe for 1 bit images on GIMP you could try setting the image mode to indexed and then generate a palette with just two colors. GIMP can also apply dithering if you want
I have the same question, for me the KDE slider works like 1/6 of the time. Do you have an Nvidia GPU?
Remember when people used to steal code from StackOverflow? Good times