Hi Logan,
I was hoping that you would reply, i'm curious what your issue is with
nouveau.
I did see that you have placed a message on the nouveau mailing list,
good stuff!
For others interested on the Debian PPC mailing list, i have copied the
link to your message on the nouveau mailing list which you have included
an xorg log.
Link Below:
http://lists.freedesktop.org/archives/nouveau/2016-January/023853.html
Looking at your xorg log, how many displays do you actually have
connected? one or two displays?
[ 25.454] (II) NOUVEAU(0): Output DVI-I-1 connected
[ 25.454] (II) NOUVEAU(0): Output DVI-I-2 connected
According to your log, nouveau seems to believe you have two DVI ports
occupied? Is this actually correct or has nouveau somehow gotten confused?
I have found this interesting page about the Geforce 6800 Ultra DDL. is
this the model GPU used in your Powermac G5?
Link Below:
http://www.anandtech.com/show/1581/2
Maybe, just maybe, could the dual-link TMDS nouveau module option (which
apparently is enabled by default), possibly be screwing around with the
screen detection for some reason?
If possible, could you please try disabling the nouveau dual-link TMDS
module parameter option and let me know what happens.
parm: duallink:Allow dual-link TMDS (default: enabled) (int)
Looking at your all of your logs, it seems like nouveau should work,
what i mentioned above could possibly be your last hurdle to ppc nouveau
nirvana!
Please humour me!
Cheers,
Peter