bad color depth in osx

[tristan]

Le mardi 02 août 2005 à 13:12 -0500, Tommy Trussell a écrit :
> On 8/2/05, tristan <tristan at open3net.com> wrote:
> > hi there, i got a problem with mol and my powerbook G4 17'' (nvidia)
> > i can run startmol -X, osx starts successfully, BUT,
> > display is garbaged, it seems that color depth is not correct, only 16
> > colors displayed.
> > 
> > any clue? what could cause this? is it due to my framebuffer config?
> > my terminal screen VT1-6 is in high resolution, but i don't know where i
> > could configure the color depth for console framebuffer...
> > on x86 machines, i append vga=791 to kernel parameters in grub, but on
> > ppc?
> 
> I have a similar issue, though I am using OS 9 and the problem is sporadic. 
> 
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? 

> You can add the framebuffer parameters using your boot loader ... I
> use BootX on this old PowerBook G3 Series (aka "PDQ" or "Wallstreet
> II"), and my boot parameters look like this:
> 
> video=atyfb:vmode:14,cmode:8,mclk:71 root=/dev/hda11 apm=on
> 
> My driver is obviously atyfb, and as you can see the parameters are
> cryptic. On Debian I could pass a parameter like 1024x1068-16 and it
> would work but for some reason that doesn't work in Ubuntu Hoary. Your
> driver will be nvidia with its own parameters and of course you're
> using yaboot or something on your new-world Mac, so check the docs for
> your bootloader.
> 
> 
> Here's the problem I see on mine: After the first boot of my system,
> when I run MOL some parts of the color map seem to get trashed (making
> the colors shift strangely), but after I restart X, running MOL
> doesn't seem to affect the colors. All I can figure is maybe it's
> setting the color depth to 8 the first time and then when X restarts
> it sets it to a higher depth. I had trouble getting the boot
> parameters to work at all so I don't want to experiment TOO much. ...
> Looking at dmesg it's apparent that my framebuffer is complaining
> about something because there are lots of debug messages from atyfb,
> so there very well could be a problem with my settings.
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