Re: tdfx framebuffer garbles display in 2.6.19.5

[DervishD <lkml@dervishd.net>]

    Hi Antonino :)

 * Antonino A. Daplas <adaplas@gmail.com> dixit:
> On Mon, 2007-02-26 at 18:13 +0100, DervishD wrote:
> > > Try fbset -a -vyres 600 first and let us know of the result.
> > 
> > After doing this, I no longer can garble the display (before, just a
> > "ls -lR /" was enough to do it, in fact, any big output garbled the
> > display). The only problem with this solution is that the scroll
> > speed has decreased a bit. In fact, the scroll speed is affected by
> > the vyres parameter a lot! The highter the vyres, the faster the
> > scroll, and I cannot reproduce the problem anymore after changing it
> > once!
> 
> Display panning is what makes scrolling fast which is the default
> scroll method if vyres > yres.  Unfortunately, tdfxfb occasionally
> have problems with this method, the higher the vyres, the greater the
> likelihood of screen corruption.

    Then I'll try with 4096 and will diminish the number until the
display is stable.

> That's why tdfxb limits the vyres to a maximum of 4096. As to why the
> problem disappeared just by changing this parameter, that I too don't
> know.

    Probably setting it back to 4096 will make the problem reappear.
Right now I cannot test, but I'll make some experiments.

    Thanks a lot!

    Raúl Núñez de Arenas Coronado

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