I upgraded to 14.04 and have managed to break by graphics drivers. I'm not even sure where I'm at now.
I have a Dell Studio 15 with a ATI Radeon 4500 video card. I know this is no longer supported by the latest proprietary drivers, so if I'm not mistaken I can just use the default xserver drivers (xserver-xorg-video-radeon)??
After my system upgrade I was able to login, but only when using the Recovery option from my grub menu (and just selecting the first option to continue to start up). I only had low resolutions available to me (up to 1024 instead of 1366) and everything was very slow. So I tried installing different drivers, and even tried the ubuntu-amd-catalyst-install from http://www.thefanclub.co.za/how-to/ubuntu-amd-catalyst-install, but that made things worse and has destroyed X for me.
How can I recover from this, and get things running nicely again?
I've tried to reinstall xserver-xorg-video-radeon but it fails with a dependency problem (xorg-video-abi-15, which is part of xserver-xorg-core). I try to install xserver-xorg-core and it tells me "reinstallation of xserver-xorg-core is not possible, it cannot be downloaded"