chrizzle's observation is interesting - i wonder what's going on ?
i noticed that if you switch on screen sharing, you can remotely control the mouse straight away.
on some occasions, the mouse on the real screen turned into a frozen beachball - but was still working via screen sharing.
i wonder if its something to do with the window server ?
has anyone tried the HDMI Audio patch via plist injection ?
if so, does it make any difference?
reading around, it looks like the same probs appear with mavericks etc. so i'm considering ditching this card