I just updated to 14.04 from 12.04 and graphics performance was a bit choppy/sluggish (AMD/ATI Mobility Radeon 4xxx). There's so much information and advice about what to do in this situation that I felt lost, so I just decided to go ahead and try installing the fglrx drivers.
I did this from the software center and now every time I boot there's no display.
I've got a relatively low-powered HTPC running Ubuntu 13.10, sporting a Radeon 6450 for graphics acceleration. I'm using the 14.6 beta of the proprietary (Catalyst/fglrx) This machine is presently used for:
I've noticed very poor streaming performance in Steam, and tests with other devices on my network suggest that the problem is that Steam can't leverage hardware decoding on my 6450.
I have ubuntu 12.04.2 and kde. I have fglrx 13.1 latest drivers. Sometimes I have freezes at starup, it's very annoying, and I discovered it's bug : http://ati.cchtml.com/show_bug.cgi?id=691
So maybe I should remove fglrx proprietary drivers and go back to mesa open drivers.
I want a failsafe graphics gui to fall back on whilst I'm working with fglrx drivers for a Radeon HD7950. I've just put this in my son's desktop, it's a recent fresh install of 12.04 LTS 64bit on a SSD, initially with a Radeon HD7750.
I just got Steam, and downloaded a game. It took a while, then told me I need the latest OpenGL software for my driver. So, I went to amd.com, found my driver( for the Radeon HD 6570 ) and, not to mention I couldn't do a non-force install, whenever it finished installing, and I rebooted, Unity was gone.