I'm running Windows XP SP3.
The embedded graphics controller is the Intel GM45 Chipset / Mobile Intel 4 Series Express.
The OEM drivers (it's a Dell Inspiron 1545 laptop) are provided only up to 126.96.36.19990 (Dell driver code R203389).
I usually like to stick with OEM drivers on Dell stuff, since they often have tweaked it for the specific machine. But I needed to run an app that refused to run on the old video driver (it's dated 2009). So I went to Intel's site, downloaded the newest driver (188.8.131.5255), and installed it.
It's working fine except...the screen seems a little "warmer" than usual. I.e., my whites seems slightly reddish. Oh, its ever so slight, in fact my friend was unable to confirm, but then he doesn't look at this screen every day.
Its not enough that its 100% conclusive but it definitely seems to be a little warmer. However the gamma/hue corrections do not seem to have changed, at least the driver panel reports them the same. I'm not using any gamma profiles of any sort, just default (what you get, or don't get, with a clean XP install).
I noticed the new drivers have the ability to customize gamma on a per-color basis (RGB), while the old drivers simply had a master gamma. The new driver also allows the gamma to be set below 1.0 (previous drivers didn't). Nonetheless, all the settings still appear to be the same as before the upgrade: (Brightness: 0, Contrast: 50, Gamma: 1.0). (zero brightness is more or less centered on the slider, so it seems to be the way the driver labels the midpoint.)
Is it possible the screen is actually "warmer" with the new drivers? Or am I just imagining things? Is there any way I can test it? Preferably without buying extra fancy gizmos.
Example: I turn down the Red brightness to the point where whites look bluish, yet human skin in a photo still looks more reddish-pink than it does with the old drivers.