i had the same issue with my 2690 wuxi2. NEC tech support had me access the advanced menu, make sure auto-luminance was on, and increase the setting to 5. i did so with an image onscreen so i could see if it made a difference, and it sure did! i actually liked the 4 setting best. re-calibrated with the new setting, and it worked like a charm. btw, i'm using a spyder3 with the spectraview 2 software.
I don't mean to sound preachy, but here I go:
A well-made monitor profile, in essence, accurately describes the display's known, predictable and repeatable
calibrated behavior by means of its internal lookup tables or matrix (depending on its chosen basic structure: I recommend the use of LUTs, since, based on my experience, I find them to be far more accurate than matrices).
"Known, predictable and repeatable" means that the device's behavior will not change, compared to what it was at the time it was profiled — or that, if it does fluctuate (because of voltage spikes, etc.), it will do so only within a very minimal
range, hopefully small enough not to be perceivable.
Think of profiles the way you'd think of a snapshot: the likeness remains good only as long as the portrayed subject doesn't change hairstyle, doesn't age too visibly, or doesn't undergo plastic surgery, and so on.If the device's behavior changes, the profile is no longer valid. Period.
The "snapshot" no longer resembles the subject portrayed in it. It is no longer a reasonable likeness. That's why, for example, inherently unstable devices cannot be profiled at all, because their behavior always is essentially unknown, unpredictable and not repeatable.
It follows that, if you have any sort of "automatic" device behavior going, by definition the device's behavior becomes effectively...yes, you guessed it...unknown, unpredictable and not repeatable.
At the risk of repeating myself once too often, you can only profile a known, predictable and repeatable
state. Which means: turn off any "automatic" settings of any kind,
and only then your profile should work just as intended.