[Nouveau] [Bug 21273] [NV17] PowerMac3, 6 Driver can't detect video output and xserver doesn't start

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=21273

--- Comment #98 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Sorry to keep making you try stuff, but can you put up a log of a kernel with

if (of_machine_is_compatible("PowerMac3,6")) {
  fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 1, all_heads, 2);
  return;
}

[Also, looking at Stuart's patch that worked for you all that while ago...
perhaps instead of all_heads (3 in your case) it should be "2"? Worth trying
too, but unless it produces substantially diff/better results, I don't need a
log from it.]

(You can use 3.13 now -- the bug with instmem you ran into should be fixed
now.)

And boot with

nouveau.debug=trace drm.debug=0xe

This should produce a bunch of debug info, which may be helpful. Thanks for
that nvidiafb log too.

Also, to be clear -- that fabricate_dcb_output line changes behaviour from
"screen suspends due to no output" to "screen on with garbage on it", right?

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