[Nouveau] [Bug 20006] powerpc64: Black screen using RandR12

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=20006


bmaass <bmaass at math.uni-bremen.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




--- Comment #45 from bmaass <bmaass at math.uni-bremen.de>  2009-02-28 07:30:03 PST ---
(In reply to comment #44)
> Thanks for the effort, I wasn't expecting you to have to find a copy :)

No problem, I was planning to do it some day so I could replay some of my old
games. :-)

> According to http://en.wikipedia.org/wiki/Nvidia_Quadro the fx4500 (the Apple
> option for 2 x dual-link) is the same silicon as the 7800gtx, which according
> to http://www.nvidia.com/object/extreme_hd_gpu.html is only 1 x dual-link; the
> difference is normally whether the board manufacturer has connected up the
> traces for the second link pins, and it seems your board manufacturer did, but
> then crippled it in the bios image.  We can't really ignore the image though,
> as there's going to be a majority of cases where the extra link isn't wired up.
> 
> As for using 2 x dual-link, I don't know :)  It's certainly possible that the
> card isn't clocked high enough for some part to have the bandwidth to drive two
> such displays, or (less likely) that the board is populated with some cheaper
> components that can't handle the additional electrical demands.  Assuming you
> don't have access to another 30" :) we're probably not going to find out.
> 
> Unless you can argue a good case for it, I think I'll leave things as they are
> -- an option for "let me do 2 x dual link on a card I bought thinking it
> couldn't" seems like something with very low demand (I guess I could add a pci
> id based override for this Apple card, but that still doesn't resolve whether
> the hardware can run 2 x dual-link simultaneously).

There is some oddity about an Apple S-Video adapter only working on DVI-I-0 on
these cards, I think, so there actually may be cases where people would want to
drive their 30" on DVI-I-1. But considering that there probably are less than a
10000 of these machine-card combinations out there, 99 per cent of which
probably will never run anything but OSX, the effort seems wasted.

Nevertheless, thanks a bunch for fixing this so promptly, I'm a happier person
now. ;-)


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