Xeo, if your symptoms are that the screen intermittently turns to a solid color (white, pink, etc.) with the 2010 MacBook, requiring a reboot, it is most likely a hardware defect, not any sort of driver or software issue. Several users here, myself included, have had issues with the GPU failing when used with an external monitor. In my case, i tried the machine with several different monitors and it happened with most (but not all of them). Meanwhile, my company had two other identical MacBooks with the same configuration that did not have the problem when connected to the same monitors. The fix was to have the logic board on the Mac replaced and doing so resolved the problem with our machine. I believe this issue to be the result of a manufacturing defect.
If you haven't already read the entire thread on this issue from top to bottom, I would encourage doing so, but keep in mind that users have posted about multiple issues on this thread with slightly different symptoms and therefore different causes and solutions.
Good luck, the intermittent nature of this issue makes it a challenge for technicians to reproduce and diagnose.