> Some nVidia video cards have broken EDID information. Using nvidiafb
> with CONFIG_FB_NVIDIA_I2C enabled on these systems causes the console
> framebuffer to use wrong timing information, causing the display to be
> extremely 'snowy'. Since most distribution kernels are compiled with
> CONFIG_FB_NVIDIA_I2C enabled, this prevents usage of the nvidia
> framebuffer on said broken system without recompiling the kernel
> (or at least the nvidiafb module).
>
> Solve the issue by introducing a new boolean module parameter (useedid)
> which can be set to 0 to prevent the driver from using the EDID
> information.
>
> If this patch is accepted, we can probably get rid of CONFIG_FB_NVIDIA_I2C
> altogether.
>
That's a pretty sad solution. Is it possible to detect these bad cards at
runtime via ther behaviour? If not, can we generate a blacklist for the
known-bad cards based on PCI IDs or something?
Because most users won't even be aware of the module option: they'll just
know that their card doesn't work right.
This isn't a card problem this is a monitor problem, the card just
passes through the edid data from the monitor... or else the
programming of the card registers from edid is wrong..
Dave.
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