Re: Twister savagefb doesn't sync

["Alex Deucher" <alexdeucher@gmail.com>]

On 6/6/06, Vassilis Virvilis <vasvir@iit.demokritos.gr> wrote:
> Alex Deucher wrote:
> > On 6/5/06, Vassilis Virvilis <vasvir@iit.demokritos.gr> wrote:
> >
> > The reason the savage xorg drver uses the bios is because almost every
> > panel they connect to the chip seems to require fairly custom timings.
> > the twisters and prosavages are even worse than the discrete chips.
> > Also, only the bios seems to know the magic incantation necessary for
> > dualhead.  I tried for a while to add non-bios mode setting to crtc2
> > without much luck.
>
> I don't care for dualhead right now. I can imagine it is 4 times weirder
> than my current setup. What is crtc*?

twisters/prosavages can't do dualhead anyway. crtc stands for crt
controller.  it's just another name for a display controller (ie,
thing that scans out the image).

>
> >
> > For a short term fix, just program the registers with the new values
> > from the bios.  You may be able to just get away with adjusting the
> > crtc1 dclk (SR12, SR13, SR29).
>
> I will try that. Thanks for the suggestion.
>
> A real fix may require special
> > calculations or tables for different chip/panel combos.
> >
>
> I will try for both of my monitors and I will report here any
> success or failure unless of course I am told that this info is
> not desirable.

Sounds good.

>
> Do you know if changing the number of colors 256/64K/16M requires
> clock adjustments (SR12, SR13, SR29)?

It shouldn't.

>
> Thanks for answering.

No problem.

Alex

>
>       .bill
>