[Nouveau] [Bug 78092] GK208M [GeForce GT 730M] (rev ff) (prog-if ff) nouveau module load fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78092

--- Comment #10 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Very odd. I looked at the _DSM method, and it _seems_ like it's there and
should work. The method is there, I traced through it, and based on my meager
understanding of ACPI it should be returning an appropriate buffer (via the
'NVOP' function). But clearly something's going wrong, since the prints in
nouveau_acpi.c are never even hit, which means it thinks it's _really_ not
optimus.

The only weird thing about the ACPI dump is that there are two Device (VID)
sections, but I don't know ACPI intimately enough to tell whether that's in any
way bad. You _do_ have 2 gfx cards. Presumably ACPI specifies some way of
mapping these things, but I just don't know what that is. But I bet that the
people who wrote ACPI support in Linux do :)

If you're comfortable making small edits to code, mind dropping a boatload of
printk's all over nouveau_dsm_pci_probe, nouveau_test_dsm, and
nouveau_optimus_dsm to try to see why that logic is deciding you're not in an
optimus setup? Otherwise I can probably put together a patch for you to test
out...

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