I posted a bug on this on FreeDesktop bugzilla.

https://bugs.freedesktop.org/show_bug.cgi?id=19763

I had a similar issue with other R500 cards. But they are all fixed till X1650.

I am looking to buy additional R500 cards and this bug fix would be critical to me.

Can Alex and other developers (who frequent these forums) look into this later? I don't want a fix immediately or so, but just an acknowledgment that this is in the "stack" of issues? May be in coming month. I would really appreciate that!