Am I missing a step in how to get my 4K monitor outputting in 4K resolution (or even 1080!)?
I've just made a fresh install of Ubuntu (14.04.1 LTS) and both my monitors are detected and outputting a display - my secondary monitor correctly gives it's max resolution of 1920x1080. However, the primary monitor (Samsung LU28D590DS) is only giving three available settings (graphics card is AMD R9 290X):
Previously I was having no problems when I installed Ubuntu through Virtualbox - I just had to submit the below command to get it working so not sure why it would be a problem now?:
sudo apt-get install virtualbox-guest-dkms