Apparently I have an ATI Radeon graphics card, I only know this because Ubuntu 13.04 failed to use it to display X11 after an update one day. I could get to a command prompt but X11 would not start.
After much research, I concluded that I had to run this to get it working again:
sudo apt-get install fglrx fglrx-amdcccleBut after that my second monitor didn't work, and also whenever I disconnect the laptop from the docking station, the screen shows a mess of wiggly lines and I have to reboot.
(source, source, source)
UPDATE: Someone suggested using the built-in Intel Core i7 Pro graphics card instead, one way is to disable the ATI driver in the BIOS, another is to disable via modprobe blacklist, apparently there are easy instructions on the Ubuntu wiki.
When I tried this, the functionality was even worse: No multiple monitors.
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