[Bug 105302] [DC] - Maximum pixel clock of dual-link DVI too low for some modes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105302

--- Comment #3 from Andrew Sheldon <asheldon55 at gmail.com> ---
(In reply to Harry Wentland from comment #2)
> I don't have the spec right now but wikipedia has a nice run-down of the DVI
> bounding box: https://en.wikipedia.org/wiki/Digital_Visual_Interface#Digital
> 
> Basically 2560x1600 @ 60Hz is the highest allowed for dual-link, which is
> just a tad above your 2560x1440 @ 60Hz. 110Hz at full resolution would
> definitely not be supported by DVI.
> 
> What monitor are you using? Is it intended to support 110Hz at full
> resolution on DVI? Could it be that this full monitor capabilities are only
> supported through DP?

It's a cheap Korean monitor that only supports DVI-D (Qnix qx2710 single input
version), and unofficially supports greater than 60hz. You're right, it's above
DVI-D spec but it would be nice to have an option to use higher pixel clocks
nevertheless. The Nvidia binary drivers have the option for ignoring the pixel
clock check so there is at least one example of this being supported in the
wild.

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