Problem on T400 Brightness using OEM Intel video drivers under Windows 7
I have a problem with the brightness of my T400-6474CTO, the issue is when I set the Power Manager Option to my Custom Option or even the default chosable Option on the power plan the display brightness on the setting of battery setting is in full and in the AC setting is in min. I am using the Power manager 3 V3.25 and Windows 7 32bit and the latest video driver from the intel website.
OEM Video drivers often work well, but can sometimes fail to support some Lenovo specific features or have adverse interactions with the software built into Lenovo's preload. For this reason, Lenovo recommends and supports drivers released on Lenovo's support site www.lenovo.com/support.