SO I had a Radeon HD 6850 on my Lubuntu 12.10 machine running fine. I opened the case to rearrange components to make it look nicer. In doing so, I moved the graphics card from the first PCIe x16 slot to the third one. Now, Minecraft blackscreens, and I try to open the AMD Catalyst Control Center, but it gives me the message:
There was a problem initializing Catalyst Control Center Linux edition. It could be caused by the following.
No AMD graphics driver installed, or the AMD driver is not functioning properly. Please install the AMD driver appropriate for you [sic] hardware, or configure using aticonfig.
What do I do to fix?
I tried setting the BIOS to put VGA primary to PEG3 (whatever that means), so it's not trying to read the first slot as default. I need this fixed ASAP, because I'm hosting a LAN party next week!