(In reply to comment #55)
> (In reply to comment #54)
> > Just tested with 6970, still fine, no AMD-Vi messages in dmesg.
> > 
> > I have gfxmode/gfxpayload commented out from grub.cfg, maybe that's the
> > difference between your and mine setups.
> 
> Maybe, I'll test it later then. After all, I do have gfxmode and gxpayload
> used in my grub.cfg.

Even with gfxpayload=text (which is working correctly without all the patches),
I still have the AMD-Vi IO PAGE FAULT messages.