I'll move you over here to the monitor section but I'm not sure if it's actually the monitor. It could also be the GPU or the cable. Maybe someone here has an idea though.
It almost sounds to me like the link is failing the handshake and degrading but I don't know if any tools to validate link quality and throughput. That seems like it would be useful.
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…