On Tue, Jul 31, 2012 at 10:18:56AM -0500, Seth Forshee wrote: > On Sun, Jul 29, 2012 at 09:59:00PM +0100, Matthew Garrett wrote: > > On Sun, Jul 29, 2012 at 09:52:51PM +0100, David Woodhouse wrote: > > > On Sun, 2012-07-29 at 20:39 +0100, Matthew Garrett wrote: > > > > And it looks like intel_lvds->edid is only set during > > > > intel_lvds_init(). > > > > That seems less than ideal. How about something like this entirely > > > > untested patch? > > > > > > Actually, it works if I write 'MIGD' first and then 'IGD'. Looks like we > > > aren't switching the DDC over to the new gfx card soon enough in the > > > process? > > > > Yes, the call to the switcheroo code only comes after the card is > > powered on. Cc:ing Dave Airlie - what are the expectations here? It > > looks like i915 should have a reprobe function. > > I dove into this yesterday and ended up with something similar to what > you had. I'm rescanning for the EDID from the reprobe callback, and I > also made it so that intel_lvds_init() will still keep the LVDS > connector even if the panel isn't attached at boot and > intel_lvds_detect() returns connected/disconnected based on whether or > not we found an EDID for the LVDS. > > All of this is working to the extent that I can boot with the Radeon > card active, switch over to the Intel card, and get the EDID for the > internal panel and an external monitor (although oddly on an HDMI > connector, no on the DP like I expected). Both screens are remaining > blank though. However I'm also getting blank screens if I mux over to > the Intel GPU from grub before loading the kernel, which used to work > for the LVDS panel at least. > > I've copied the whole series of patches I'm running on top of 3.5 to > http://people.canonical.com/~sforshee/apple-gmux-patches if anyone else > wants to give them a try. The i915 changes are in patches 13-17. I've > also pushed the i915 patches to my gmux-switcheroo branch.
Aha! I forgot to add i915.lvds_use_ssc=0 to the kernel parameters. So with that and the above patches I can boot to the DGPU and successfully switch between it and the integrated GPU. My VT console isn't showing up with the IGPU, but the desktop does shows up. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
