The nv driver contains no code to program the DVI interface. The
only reason why it works at all with DVI is because the BIOS setup
the timings for the text mode. Subsequently, the nv driver is not
able to run in any mode other than the one the BIOS setup. If the
BIOS setup the text mode to 1024x768, the nv driver will not be able
to use a higher mode.
Many high resolution DVI modes are only possible if complicated
reduced blanking interval timings are used, subsequently, they are
often omitted from the BIOS for lack of space. That is usually
the reason why the BIOS will setup a mode lower than the native
panel resolution. Sometimes video BIOSes do support reduced
blanking interval calculations though. You might want to contact
your card vendor to see if they have an alternative BIOS.
Mark.
On Fri, 26 Nov 2004, Antonino A. Daplas wrote:
> Hi all,
>
> Looking at the xfree86 source of nv, it seems that the maximum resolution
> achieved when the input type is DDI is set by the BIOS (fpWidth/fpHeight).
>
> Is there a way to bypass this limitation such as a flatpanel display capable
> of 1600x1200, but only 1024x768 is achievable. IOW, what registers
> need to be programmed to set the panel size to a higher value.
>
> Hardware:
> GeForce4 Ti 4600
> Display: Manufacturer: IVM Model: 4800: Name iiyama
>
> Any help will be greatly appreciated.
>
> Tony
>
>
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