On Wed, 2012-07-11 at 02:25 +0200, Andreas Heider wrote: > Thanks for adding me, seeing the gmux driver progress is always great. > > Regarding the original patch: This is probably only useful when the gmux > was switched in GRUB and there's already a solution for the resume > problem in userspace > (http://ubuntuforums.org/showpost.php?p=10695119&postcount=261). Maybe > the same could be achieved a bit cleaner by simply using a few parts of > the switching patch? > > Regarding the gmux switching patch: The patch itself should work and > hopefully doesn't break stuff that wasn't broken before. But without > additional fixes to i915/nouveau/etc. It won't be too useful either, > although it should fix the resume issue. > > I'll look into how well it works with the current kernel on the weekend, > but I don't want to promise too much since time is still a bit of an > issue for me.
Using the patches from http://www.codon.org.uk/~mjg59/tmp/radeon_efi/ and http://www.codon.org.uk/~mjg59/tmp/gmux_switcheroo.diff I can almost get this working on my MBP8,3, chainloading the kernel from grub1-efi. I have to fix pci_map_rom() to return pdev->rom even if the resource has the IORESOURCE_ROM_SHADOW flag (Matthew's patch still returned 0xC0000), and I have to fix a bug in vga_switcheroo_enable() where it uses client->id before actually setting it. And then, if I hack head64.c to switch the mux over to IGD but leave the Radeon powered up: ("outb(1, 0x728); outb(2, 0x710); outb(2, 0x740);") ... and on the occasions that it doesn't crash in fbcon_event_notify() as shown at http://david.woodhou.se/vga-switcheroo-oops.txt ... it boots with a blank screen but I can log in over the network and I *can* actually switch between displays. After switching to 'DIS' and back to 'IGD' it does actually start working, and I seem to have both X and fbcon working sanely on both. Although on an earlier boot I don't think fbcon was working on the Radeon but X *did* work on both. So maybe that's not 100% repeatable. Hard to say... I've only managed to get it to boot twice; mostly it oopses as shown above. If I don't hack it to switch the mux to IGD at boot time, I never manage to get a sane picture out of the Intel device after switching to it. It's late now, but I'll try to get a proper debug log of the working and failing cases tomorrow. -- dwmw2
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