Problem with drivert of intel 4 series Express Chipset Family

[idata]

I have a Lenovo Ideapad U330 and it has a http://www.intel.com/support/graphics/intelgm45 Mobile Intel® 4 Series Express Chipset Family Graphic chipset.

The problem is,when I update the chipset driver to a newer one than the pre-installed (from 7.15.0010.1576 to any newer one),my LCD brightness doesn't change and it locks at the most bright condition, and that's shortens the battery life...

Thanks for your attention.

[Allan_J_Intel1]

Try the latest graphics drivers on the Intel site

http://www.intel.com/support/graphics/detect.htm

If no help, I recommend checking with your computer manufacturer for your customized drivers for your computer model

[idata]

I've tried the latest version of the driver and it did'nt work properly...I don't see the problem in manufacterer softwares,because when I re-install the older (pre-installed) version of the driver,it works properly,without re-installing the power management softwares...

thnx.