[Nouveau] [Bug 63481] [NV1A] No monitor signal since commit ebb945a94 (3.7-rc1)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63481

Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Nouveau driver - No         |[NV1A] No monitor signal
                   |monitor signal on chipset   |since commit ebb945a94
                   |NV1A (family NV10) since    |(3.7-rc1)
                   |bisected bad commit         |
                   |ebb945a94bba2ce8dff7b0942ff |
                   |2b3f2a52a0a69 in kernel     |
                   |3.7.9                       |

--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
I've tried the direct approach here of staring at the commit. It all seems
generally plausible, but as you probably noticed, it's quite rather large.

I think that the way to go for solving this will be to run an mmiotrace of it
working and then not working, and compare. Once we know exactly which functions
aren't being called, it should be easier to figure out why. Would you be up for
putting the two mmiotraces together? Here's a guide on how to do it:
https://wiki.ubuntu.com/X/MMIOTracing (but replace "nvidia" with "nouveau").
You'll obviously need to compile nouveau as a module.

BTW, I assume that the monitor goes blank as soon as the modesetting happens,
not when X starts? It does seem to find your monitor, X gets EDID (which
another NV1A user isn't getting, odd). But it just never turns the crtc on...
or something.

Also, could you provide some details about the physical hookup -- is this DVI-D
(digital) or VGA/DVI-A (analog)? Is there just a single connector or are there
multiple ones? What type(s) of connector?

Lastly, might be worthwhile to just try the latest and greatest kernel
(3.11-rc6). I have pretty low hopes for a fix to nv1a going in since 3.9, but
who knows, something could have jiggered it.

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