I've been trying to figure out how to increase the screen resolution on my CentOS vm inside vCloud director. The resolution for my centos vm was maxed out at 1176 x 885. In Order to get a higher resolution on my vm, I had to increase the video memory for the vm. I wasn't able to add the video memory from inside vCloud director, I had to go to vCenter to increase the video memory. (right click on the vm, go to edit settings and select video card.) you will also see a video memory calculator to calculate the proper amount of memory for the resolution you desire. I know its a simple thing, but it took me a minute to figure this out. I figured I'd put it on the discussion board in the event that someone else needed or wanted this information.
Thanks,
J