My Optimus V is set at:
MAX: 768000
MIN: 245760
If I go above 768000 for the MAX with scaling OnDemand, the phone crashes sometimes and reboots itself. So I think setting yours to match mine will be the best bet for you.
And I have a profile set for when the screen turns off the CPU goes to:
MAX: 245760
MIN: 122880
It really saves your battery when you use the screen off profile.
What is the recommended profile for when the screen is off?
Set it as high as you want then run a stress test for about 10 or 15 minutes and if there are no problems then your good and if there are problems then dial it down and try again.
Sent from my topless assistant