first. There is a good reason it is sticky and even marked with ---> <--- (maybe it should be huge and blink and no threads can be opened if it wasn't read first ...)
With this much information (almost none) it is more a quiz show than a support case.
It might be that
1) EDID misdetection, so you only have one resolution available
2) you are using XRandR based tools
3) you are not even using the nvidia driver
For all of those there are good solutions, but we first need to know what the problem is.
Please attach a bug report as described in the above mentioned thread.