Re: Powerbook3,5 Radeon R250 Apple Cinema Display Dual Head
On Wed, 2005-05-04 at 11:35 -0700, Giao Phan wrote:
> I know this has been beat to death on the list, but this particular
> combination is probably the nastiest. I'm trying to get the 23" Apple
> Cinema Display to work as a secondary head (I would be happy with a
> clone, or just having work alone as well). I have this working with a
> NEC LCD, using a VGA->DVI connector to, but I always get the problem
> that the Apple Cinema Display doesn't turn on even though it is probed
> correctly by xorg. I gathered from the list that on the latest xorg
> snapshot (6.8.99.5
> <http://xorg.freedesktop.org/snapshots/xorg-x11-6.8.99.5.tar.bz2>) that
> included this patch
> <http://lists.freedesktop.org/pipermail/xorg/2005-April/007250.html>
> that would indicate that it should fix this bug, but from what I can
> tell it did not. (I'm running it now.). I also saw that
> linux-2.6.12-rc has the same fix, but for the FB. I'm not runnnig
> 2.6.12-rc yet, do I need both to get it working in xorg?
>
> I can post configs and logs by request, they are a bit long though.
As I wrote several times, the DVI output of laptops is not working yet
because of some hard coded assumptions in X that a secondary digital
display is always using the secondary DVI output (while on laptops with
an internal LVDS panel, it's actually the primary output).
It's possible to "make it work" by whacking a few chip registers after X
launches, but that's an ugly hack. I haven't yet had a chance to try to
code a fix.
Ben.
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