W540 Changing to Airplane Power Plan

Recently my W540 is changing to Airplane Mode Power plan automatically which I don't wont to occur.  It is plugged into a normal 240V wall plug.
How do I stop it from changing power plan mode which dims the screen and doesnt maintain charge.  I have tried disabling and deleted the power plan but it keeps coming back and changing!!!
Any help appreciated.
Cheers,
Tyron

I had the same issue.  Are you also using another software tool to control the power plan?  e.g. TuneUp utilities.  If yes, look for a software conflict, and disable the TuneUp optimization of the power plan.
Be careful with add on programs, many have redundant applications that interfere with the native OS drivers.

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