Re: Corrupted display after Debian 6.0.2.1 installation on iMac G5

[Aaro Koskinen <aaro.koskinen@iki.fi>]

Hi,

On 3.10.2011, at 13.11, Michel Dänzer wrote:
> On Son, 2011-10-02 at 12:46 +0300, Aaro Koskinen wrote:
> > Hello,
> >
> >  I finally decided to switch from Mac OS X to Debian on my
> >  G5 iMac. I downloaded the netinst CD image, and the
> >  installation worked just fine.
> >
> >  Unfortunately, now when I reboot the installed system, it's
> >  unusable due to corrupted display (there's just some
> >  psychedelic noise, you barely see any text). The boot and
> >  console display are fine up to the point when the DRM kernel
> >  modules are loaded, I think.
> >
> >  Is there any way I could disable the DRM and other "advanced"
> >  graphics stuff from the yaboot prompt, and use just the bare
> >  frame buffer?
>
> Does radeon.modeset=0 work around the problem?

The graphics card is GeForce FX 5200, not Radeon. With "nomodeset"
kernel parameter I got the console working fine, however, when X
was started there was again an another issue: the colours were totally
messed up.

I was so unimpressed by all this that I have now restored now my
old Mac OS X installation.

A.