atyfb and 8500+ATI RagePro

Geert Uytterhoeven Geert.Uytterhoeven at
Fri May 7 00:48:21 EST 1999

On Thu, 6 May 1999, Mike Ladwig wrote:
> I wrote:
> > > Recently, I came across a post my Hugy Caley about a "hacked" atyfb
> > > driver from Abe White.  I thought I'd give it a try.  Using the
> > > parameter line, "video=atyfb:vmode:19,cmode:16", I actually get a
> > > somewhat reasonable display
> Since writing this, I have found the single key line to the Abe White
> patch
> that helps me.  I noticed that in the 104 version of atyfb that
> RagePro LT stuff similar to the hack was added in, so I thought I'd
> focus on
> what wasn't added.
> If I add an immediate 'return' to aty_set_pll_ct, my
> system will boot with BootX parameter "video=atyfb:vmode:19,cmode:16". 

Hence the problem lies within the programming of the pixel and memory clocks.

> I believe
> the atyfb driver is at least somewhat working here, because I can run
> Xconfigurator and get an FB_Dev X server up, so long as I pick a display
> mode close to
> vmode:19,cmode:16.  X doesn't work outside of Xconfigurator, but I hope

Indeed, then you cannot change the pixel clock so you must choose modes that
are close enough.



Geert Uytterhoeven                     Geert.Uytterhoeven at
Wavelets, Linux/{m68k~Amiga,PPC~CHRP}
Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium

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