Re: [Linux-fbdev-devel] [PATCH] nvidiafb: allow ignoring EDID info

From: Antonino A. Daplas
Date: Thu Feb 22 2007 - 18:31:51 EST

On Thu, 2007-02-22 at 20:08 +0100, Giuseppe Bilotta wrote:
> On 2/22/07, Antonino A. Daplas <adaplas@xxxxxxxxx> wrote:
> > On Thu, 2007-02-22 at 16:55 +0100, Giuseppe Bilotta wrote:
> > >
> > > However, I'm still getting the same snowy effects, which doesn't come
> > > as a surprise since the actual mode timings used are just the same ...
> >
> > Yes, because the EDID has only 1 mode entry. But now you can use 'fbset
> > 1024x768-60' (or any mode smaller than 1600x1200-60) for example and it
> > should work.
> No, it doesn't. I've tried all the methods from 640x480 to 1600x1200,
> and they /all/ come up snowy. This is starting to look queerer and
> queerer. I've also tried changing vf min and max as you suggested:

Before we proceed, do you agree that the patch will allow you to change
video modes without disabling DDC support? So this is still a valid

> > You might want to change vfmin and vfmax to 59 and 61
> and even the M and MR methods which you suggested in the other email.
> Since nvidiafb is being loaded from the command line because it's a
> blacklisted module otherwise, I've been using the mode_option option.
> However, neither the mode_option nor fbset seem to give me anything
> not snowy.

When does your display become snowy? Is the snow constant or does it
only snow when doing heavy text operations, such as scrolling?

I presume that X's nv driver or vesafb does not exhibit this problem?


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