In descending order of priority, the things I want to be able to do on the Ubuntu machine are...
1: Run Google Chrome to access the Internet
2: Run Foobar2000 to play music
3: Run VLC to watch movies (through TV connected as a second monitor)
4: Code development (specifically, port my Foobar speech plugin so I can use it without Windoze)
So far the only "non-default" thing I've done is to install Chrome as the default browser. That was easy, because it was already available in the Ubuntu Software Centre which I accessed from the Dashboard just using the mouse.
The Ubuntu machine has an ATI Radeon HD 4300 video card, which is more than capable of supporting the 1920x1080 resolution I'm used to on this monitor. But when I go into System Settings and select Screen Display, I'm only offered a choice between 1024x768 or 800x600.
I downloaded *iiyama_drivers.zip,* opened it, and found a folder containing three files E2407HDS with extensions *.cat, *.icm, and *.inf, but I don't know what to do next.
I'm writing this question on the other PC (running Windoze XP because I'm finding the relatively lo-res Ubuntu browser window awkward). Both machines are powered up, and I've been using the switch box to swap between them. The Ubuntu system has just "auto-updated" itself with several things, including something called fglrx which appears to be a proprietary driver for ATI Radeon video cards. But the Additional Drivers facility in Ubuntu still says No proprietary drivers are in use on this system, and the Screen Display facility still only offers the lower resolutions.
Please note that I'm a complete noob as regards Unix/Linux/Ubuntu. I don't even know how to access the "command-line prompt", let alone what or why I should type anything in there. And I'm leery of experimenting because short of re-installing I've no idea to get back a functional system if I mess up.
So - how can I easily (ideally, using just a mouse) improve my screen resolution?
(I know I should only ask one Q per post, but a link to "system snapshot backup" would be good, too.)