What driver version, specifically, are you running?
ATI Mobility Radeon HD 5000 (Microsoft Corporation - WDDM v1.20)
You need to get the correct driver from AMD.
Try unistalling your vga from device manager and then install it with the newest drivers from amd.
I had a similar issue, I noticed that when you install AMD driver it creates a folder on the C Drive, after uninstalling the VGA driver I was able to update the driver from C:\AMD, just right click on the desktop and choose Screen Resolution > Advance Settings > Adaptor Properties > Driver > Update Driver. Locate AMD folder on the C Drive Mine looked like this "C:\AMD\AMD_Catalyst_12.6_Legacy_Win8\Packages\Drivers\Display"
After a reboot it should work.
Thanks, I sense I am now getting very close. When I uninstall the generic Microsoft/AMD 5000 series driver, W8 replaces it with the Microsoft Basic Display Driver (from 2006) which is a good thing I guess so I still have a screen to look at. Then I follow your instructions, and I have to pick "Let me pick a driver from a list of devices on my computer", which let's me get to the Drivers folder. Then once at the Drivers folder it makes me open one of 3 *inf files in a ssub folder, then I end up with the error: "The folder you specified doesn't contain a compatible software driver for you device. If the folder contains a driver, make sure it is designed to work with Windows for x64-based systems."
Then everytime I try to install the AMD driver software I go through the install package and it says it installed, but nothing really gets installed. I'm wishing Dell went with Nvidia 3 years ago.
Back to square one I guess...
AMD has an uninstaller on there site. I seems you are still trying to install driver through the OS. You do not want to do this waym they can be months out of date.
Go to AMD.com and find your card make and model. Then download the catalyst 12.8 or 13.2 v6 beta driver.
Thanks everyone for all the helpful advice.
I finally gave up and called Dell (thank god for my 3 year XPS warranty). Screen shared with a techncian who was surprisingly knowledgeable, and even though he tried updating different versions of the driver for about an hour, he finally suceeded when he went through this link on the AMD site, using the driver verification tool:
Then he downloaded the file:
He was finally able to load up Catalyst Control Center and the proper AMD driver. CS6 now sees the graphics adapter.
Hopefully this thread helps some other poor W8 upgrader like me.
Unfortunately the 13.1 drivers have some bugs. The 12.8 drivers are stable, and the 13.2 beta 5 drivers appear to fix most of the bugs.