I have been using the Dell U2410 monitor via its DVI-D port for around 6 months. It has worked without issues.
I just built a new PC and started using the U2410 in a dual monitors configuration (along with a U3011) with TWO DisplayPort cables from my new video card. The U3011 has worked without issues thus far. The U2410, however, would not display its highest resolution. Only resolutions below 1920 x 1200 are available!! Furthermore, it was only able to be at 24Hz!
I did a great deal of troubleshooting before writing this. I swapped DisplayPort cables: both cables proved to be fine. I tried BOTH ports from the video card: both ports work fine with the 30" U3011. The ONLY item (the only possibility) is that the DisplayPort of the U2410 is defective!
Reconnecting the U2410 via the DVI-D cable works again. Hence, it is only the DisplayPort input that is seemingly the broken part.
May I ask if this is a common issue with the U2410? What might be the best resolution of this problem?