(In reply to comment #131)
> I have just played a youtube video (coincidentally the youtube message from
> AMD's John Byrne regarding Catalyst!) and I have just checked that the
> following messages show up in the dmesg log:
> 
> [ 2053.298531] radeon 0000:05:00.0: Packet0 not allowed!
> [ 2058.548486] radeon 0000:05:00.0: Packet0 not allowed!
> [ 2166.793537] radeon 0000:05:00.0: Packet0 not allowed!
> 
> Given that the video is very short and I haven't played any other youtube
> video the system hasn't crashed (yet). I presume that if I were to play
> other videos the system would hang.

I saw that also at at least one time. I'll look in my logs for this when it
hangs.