I recently installed Ubuntu GNOME 14.04.1 on my new laptop with an Ralink RT3290 wireless device and an NVIDIA GeForce 820m graphics card. My problem is that the drivers to none of these devices are shown in the additional devices. Might I have installed things wrong or is this a bug in the distro or anything else? I have been able to install nvidia drivers by CLI, and WiFi is also working, but should I be worried that none of them are showing in the application?
The Additional Drivers tool in Ubuntu only shows devices, for which there is a proprietary driver, i.e. a driver, which source code is kept secret by its producer.
This tool doesn't show drivers that you installed manually, but proprietary drivers that are available, and lets you choose from them.
For your RT3290 (I got the same), there is no proprietary driver. There is an open source driver on their website, but it only works for older Linux versions. So your best (and in my experience not bad) chance is to keep the preinstalled
rt2800pci driver and keep using it as a default.
If you, like me, got the version with Bluetooth, don't even try. The module you'd need is called
rtbth. After applying various patches, I managed to set it up in DKMS, only to learn that the driver doesn't work properly. You can find Bluetooth devices and they can find you, but you can't pair with them. So if you need Bluetooth, get a Bluetooth USB Dongle, like I did.
Now to your Graphics Card: There certainly IS a proprietary driver for most nVidia chips. It is indeed strange that the card doesn't show up. As you pointed out, it bay be a bug, that the combination of your card and the proprietary nVidia driver is not detected automatically, and is therefore not shown.