bad color depth in osx

[tristan]

Le mercredi 03 août 2005 à 10:55 -0500, Tommy Trussell a écrit : 
> On 8/3/05, tristan <tristan at open3net.com> wrote:
> > it tells me:
> > No video mode matching the default one
> > Video driver(s): (console video)
> > 
> > it seems that i am in 1440x900/8bits
> > 
> > you could i pass kernel params in yaboot.conf?
> 
> I might be wrong but I think we're talking about two different things here ... 
> 
> I do not use yaboot on this oldworld Mac but I determined that you CAN
> pass kernel parameters in your yaboot.conf -- put them in the second
> stage bootloader section. it will look like this:
> 
> image=/vmlinux
> 	label=l
> 	root=/dev/hda11
> 	read-only
> 	append="video=ofonly"
> 
> I think all of those are kernel parameters, but the append="" part is
> where you will replace the ofonly with the exact parameters needed for
> your video. Be very careful what you put there, however, because you 
> can damage your LCD if you use a bad parameter and leave it on the
> screen too long.
> 
> The error message you mentioned sounds like it comes from mol -- have
> you run molvconfig to set the available video modes? After you find
> the kernel parameters I would run molvconfig again to make sure you
> have selected the best modes for your system.
sure, i've run molvconfig before, but the only OK is actual mode
(1440x900/8bpp) all other modes are not considered valid. 

i found this
http://lists.debian.org/debian-powerpc/2004/10/msg00207.html

That explains why it doesn't work: stock linux kernels don't support
framebuffer acceleration, so only way is to use OF framebuffer, wich is
limited to 8bpp ... or use X window (slower but 32bpp)

So it rises another question: is there a nvidia driver that support
accel fb on linux/ppc ?