I posted this over at the Adobe Photoshop forums, and I'll repost here. This worked for me, solving Photoshop and OpenGL issues with my Radeon HD 4980 it seems. Didn't realize this was a problem with all OpenGL! Minecraft wouldn't even start with the default driver.
Specifically, I followed these steps:
Downloaded drivers from: http://support.amd.com/us/gpudownload/windows/legacy/Pages/legacy-rade onaiw-vista64.aspx
Unpacked files (run it or extract with 7-zip) but cancelled Catalyst install process after unpacking.
Went to device manager (control panel -> device manager or winkey+x -> device manager)
Right clicked my card under Display Adapters -> 'Update Driver Software...'
Click 'Browse My Computer For Driver Software', then 'Let me pick from a list of devices on my computer', then 'Have Disk', then 'Browse' and find the directory where the drivers are in the package you just extracted.
Example: 'C:\AMD\Support\12-6-legacy_vista_win7_64_dd_ccc_whql\Packages\Driver s\Display\W76A_INF'
Example: 'C:\AMD\Support\12-4_mobility_vista_win7_64_dd_ccc\Packages\Drivers\D isplay\W76A_INF'
Here I had two inf files and I wasn't sure if I needed the one that began C7 or CH. I guessed C7.
Clicked next, drivers installed, screen flickered - Photoshop and Minecraft both working fine.
For those of you on Mobility devices, there's some specific steps here:
LockerGnome echos these steps for both mobility and desktop cards, giving them some credit:
But I was not at all able to find the LH6A_INF folder he mentions, just W76A_INF
I'm also not going to try the "bcdedit" commands he recommends until I see reason to, like if the driver reverts after reboot or Windows Update or something. Nor have I seen any graphical issues in Metro yet.
Again - Photoshop GPU functions and other OpenGL applications like Minecraft seem to be working fine.
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