Hi,
I purchased the U2715H monitor instead of the Apple Cinema Display as it was strongly recommended by several Mac review site. However, when comes the time to plug it in my MacBook through the MiniDisplay Port (not ThunderBolt), the monitor instantly goes on Power Save Mode. The only way I can use it is through a HDMI adapter and then, the resolution maxes out at 2048 x 1152.
From what I understood on different sites, it is a problem with the EDID of the Dell Monitor on the Mac OS. It is possible to override the EDID through a Ruby Patch but in order to do that, I would need to be able to plug the U2715H through the MiniDP, put the Mac in Clamshell mode (close the MacBook so only the secondary screen is used) and then start the Ruby Patch to create the appropriate DisplayVendor ID. However, because of the aforementioned problem, it is impossible to do so (screen automatically goes in power Save mode). See http://embdev.net/topic/284710
So if you could create the DisplayVendor ID override for the U2715h (it would be named DisplayVendorID-10ac) and share it, it would be great.
Hope the solution is possible since I would be able to keep the monitor instead of returning it.
Thanks,
Dom