determine current screen resolution?

I have sucessfully installed U-lite. How does one determine the current screen resolution (e.g. 1024 x 768 )?

Next question:

In another thread in this forum; http://www.u-lite.org/content/question-about-screen-sizeresolution
In the second post :

-quote-

"LXRandr works as long as you have a driver installed"

What is meant by "driver installed"?

I assume it means the device driver for you monitor

not sure about the first question. Does lxranr not do anything?

thanks for responding. The

thanks for responding.

The first question was: you're standing there in front of your computer- how do you tell what the current resolution is?

Regarding the second question. I looked into lxrandr and learned how to set the resolution (and it worked). But I'm still wondering what was being to refered to when that person wrote "if a driver is installed." Did they mean third party driver? or "driver installed" as opposed to you're in non-graphical mode because no display drivers installed during OS installation?