On Tue, Dec 17, 2013 at 11:45:45AM +0000, Chris Wilson wrote: > On Tue, Dec 17, 2013 at 11:21:27AM +0200, Jani Nikula wrote: > > On Mon, 16 Dec 2013, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: > > > Touching the VGA registers risks a hard machine hang, at least on this > > > ivb machine after removing a conflicting efifb. This is more than likely > > > related to the discovery that VGA IO decode on the more recent PCH > > > platforms is terminally broken. > > > > Please double check the config space address. At a glance, it looks like > > we should be using SNB_GMCH_CTRL since SNB. Might explain the issues? > > Hmm, indeed. This bit is at a different location on SNB, but it is > locked. Which is where all the vgaarb madness began last time. Ok, that feels at least as stable as not writing to the invalid address. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
