I couldn't really understand any of the other threads with this name, and I really want help with it, so I'm sorry about the duplicate.
After I installed Ubuntu 12.10 64bit it ran smoothly for a couple of days, and then when I booted up another day it came with the message: "Your system is running in low graphics mode". I followed a guide and reinstalled the "deskop", then I installed the right graphics drivers: Nvidia experimental 310. Then it ran smoothly for 2 days, and now the error is back again :/. So is there a way to permanently fix the problem? Thanks in advance.
Gpu: Asus Nvidia Geforce GTX 580 1.5gb
Cpu: Intel i5.3470 (3.9ghz)
MB: Gigabyte Z77-D3H
Ram:Kingston Hyper-X duelchannel ddr3 4x4gb
The system is running on a Samsung 840 series sdd.