On Mon, Jun 01, 2015 at 08:22:27AM +0200, Bruno Prémont wrote: > On Fri, 29 May 2015 18:36:50 +0200 Darren Hart wrote: > > > Making sure to lock only the intel GPU when present and especially protecting > > > against nvidia driver will be hard if legacy-IO is being processed by a hidden > > > device! > > > > Ugh indeed. Worst case we can special case via dmi strings. Is this Apple device > > significantly different from others? Bruno, what are you testing on? > > I only own a pretty old MacBook Air with just NVIDIA IGP and had to > rely on BUG reports and testing from affected users. > > Not doing anything on apple-gmux when only a single GPU is visible > should be easy, but denying any vgaarb operation when Intel IGP is > hidden and just discrete GPU present is much harder (if one does not > want to risk opening the next can of worms). > > DMI based special-casing would work but will it uncover the next issue > with the same device configured differently? No, we would need a combination. I presume "configured differently" would mean the Intel GPU present - which would be detectable. DMI + Nvidia = do A DMI + Intel = do B -- Darren Hart Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
