I split this because I believe you’re not the only one to experience this issue so it may be useful to have the problem solving documented where people can find it.
Does this happen using all software applications? Are you using anything where you can choose a different renderer (Overlay, VMR9, EVR)? Have you tried ddifferent driver versions? I thought I saw someone mention that Cat 10.5 was the last really good release for HTPC use.
