Radeon/PowerPC: No video output after update 6.12.1 -> 6.12.99; 6.12.192

[Alex Deucher]

On Mon, Apr 12, 2010 at 2:46 PM, Albrecht Dreß <albrecht.dress at arcor.de> wrote:
> Am 12.04.10 20:25 schrieb(en) Alex Deucher:
>>
>> What connector are you trying to use?  The VGA or the ADC?
>
> The monitor is a Formac Gallery 17" flat panel, connected to the ADC.
>
>> if you are using the ADC, are you using the analog or digital portion?
>
> Hmm, I *think* it's the digital interface.  The Formac's manual says that a
> ADC-to-DVI adaptor is needed to connect it to a Windows PC.
>
>> We may need to add a special connector table for the card.
>
> So you think it's the card driving the wrong output?  Could that cause the
> effects I see (the greenish shades, evolving only after ~5..10 seconds, and
> a horizontal, or sometimes vertical line?  Wouldn't the screen simply stay
> black?

Depends how apple wired up the ports.  Do either of the following options help?
Option "NoAccel" "True"
or
Option "AccelMethod" "EXA"

Alex