That sounds like an OS and Driver issue not a DP/HDMI standards issue. It seems like in an effort to be as quick as possible (and backward compatible with VGA a

That sounds like an OS and Driver issue not a DP/HDMI standards issue. It seems like in an effort to be as quick as possible (and backward compatible with VGA adapters?) this problem has persisted for years. I've fixed mine by setting configurations away from auto/default, but updating drivers will often force me to do it again. Don't think it's the hardware that's pushing 20-80Gb/s through 10ft of cable causing the issue... they don't specify OS/driver interactions. They just report available resolutions/rates in their PID and display on SleepOut command from the host register/packet interface.