I have installed ubuntu 14.04 as a dual boot OS on my Asus Chromebox and I'm a linux newbie.
Anyway, everything seems to be working fine except for the DisplayPort monitor not working. The Chromebox has two outputs - DisplayPort and HDMI. I have a HDMI -> DVI cable as well as a DisplayPort -> DVI adapter hooked to a DVI cable. Both monitors work fine in ChromeOS mode, but only the HDMI port works in Ubuntu mode.
I went to the display settings in ubuntu but only the HDMI-connected monitor is showing up. I have swapped the cables to hook into each different monitor but only the HDMI one works no matter the setup.
Also, if I only hook up the DisplayPort and boot into Ubuntu, it does show a little bit of text for a second before it goes into graphical mode and then the monitor loses signal. So I'm guessing it's a missing driver or something. Is there some way to see if I have a missing driver or something that would be needed to detect this second monitor?