I've got this problem too, but in my case, I've got an LCD in which refresh rate should be set at 60hz. However, the OS reverts it to 75Hz at every reboot. I think it can be harmful for my LCD due to overheat and overload. I'd found out that in Xubuntu 12.04 the problem doesn't exist, so I installed it yesterday at this is true. Xubuntu works like a charm. But I like Ubuntu more, so I'm hoping someone knows how to fix it.
I've got this problem too, but in my case, I've got an LCD in which refresh rate should be set at 60hz. However, the OS reverts it to 75Hz at every reboot. I think it can be harmful for my LCD due to overheat and overload. I'd found out that in Xubuntu 12.04 the problem doesn't exist, so I installed it yesterday at this is true. Xubuntu works like a charm. But I like Ubuntu more, so I'm hoping someone knows how to fix it.