X220 uncontrollably switches to 50Hz refresh rate upon unplug from power source

Hello,
I'd like to reiterate that I LOVE my x220 apart from the few issues I have with it.  Having said that, I am having the (seemingly) ubiquitous problem where the laptop constantly switches to 50Hz when unplugged from a power source.  I have tried reinstalling the Power Manager and Power Manager driver, and all of my system software is up to date.
Just to be certain, is everyone else experiencing this issue as well?  I know T420s owners recently reported it and it was subsequently forwarded to engineering.  As long as a fix is in the works I am happy. :-)
Owner/Technology Specialist
Triple-S Computers - http://www.TripleSComputers.com
Solved!
Go to Solution.

Hey erik,
I really do appreciate your input.  That's a good idea, though honestly I don't know if I will bother with all of that now. :-)  Perhaps instead if I get a moment in the near future I may try wiping out all Intel graphics drivers entirely from the system manually and then reinstalling.
Having said all of that, on a somewhat unrelated note, I'm getting 4,900+ in 3DMark06, which is shocking!  After experiencing the trouble with the unplug/replug refresh rate switch, I tried a wide variety of solutions including using the 2361 graphics drivers from Intel's site.  This plus my high-speed fan settings at anything over 60C probably helped contribute to the score I guess.
But back to the topic... is anyone else experiencing these same refresh rate switching issues?
Owner/Technology Specialist
Triple-S Computers - http://www.TripleSComputers.com

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