08-07-2015, 11:16 PM
The Grim Ninja wrote:
The Mini Displayport spec runs Displayport 1.1a. Displayport 1.1a supports 2560x1600 resolution natively. It *should* be safe to assume that a Mini Displayport to Displayport connected monitor should work without issues.
I don't think it's a stretch for most people to assume the Dual Link DVI adapter would only be required for monitors that are only connectable via a Dual Link DVI. If a Dual Link DVI adapter is the only way to reach a resolution higher than 1920x1200 it is a technicality which is misleading to omit given that the port its adapted from should be natively capable of a higher resolution.
I understand, but as a counterpoint, my 720p TV has an HDMI port rated for 1080p, I still can't actually display 1920x1080 pixels on this panel. My old pre OS X PowerPC Macs can output video over VGA and VGA can support 1080p and even higher resolutions, but those old 4MB VRAM Macs aren't capable of it.
That's why I wonder if there's something in the implementation of the 9400M chipset and drivers on OS X that is preventing the output over mDP. Apple's own technical specs for that system detail the lack of support for whatever reason. Seems odd that a spec ratified in 2007 on a system sold in 2009 would be out of spec otherwise. No?