[Bug 63135] [NV96] [bisected] DisplayPort dual-head fails to switch to KMS

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=63135

--- Comment #24 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Would you mind testing this again with 3.13.x? A few fixes went in, especially
one that fixes errors setting up displays in NV96 VBIOSes (for HDMI, but your
case could be similar).

Assuming it still doesn't work help, could you attach a boot (from 3.13.x) with
nouveau.debug=PDISP=debug,VBIOS=trace ?

Also, could attach a boot from a good kernel (not necessarily the last good
rev) with nouveau.debug=debug drm.debug=0xe (this should cause a VBIOS trace
from that kernel as well... if it doesn't, I'll have to go back and re-check
the kernel parameters for the older version).

(This is banking on something being different wrt the vbios, either execution
path or perhaps when/how often it is invoked.)

Curiously I don't see any opcode 0x44 in your VBIOS. But I think there are some
tables I'm actually missing, so perhaps it's there. That's definitely an
unknown opcode though -- old or new kernels.

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