Re: 2560x1440 not working..
> I know HDMI is different than DP, but was there more to it than the cable adapter?
> Dell says the HDMI interface on the U3011 is only rated to 1920x1200,
> which it drives just fine.
There are different versions of HDMI with different maximum throughput. If it only makes 1920, you have a problem.
The DVI converter might work if it is active, i.e. has its own power supply. For the DP->DVI adapters this is a known problem. There is not enough power in the DP input to drive the 2560er DVI signal. I figure its the same for HDMI->DVI.