07-20-2009 08:16 AM
Hi There, I got a new T400 and I noticed that when I'm running unplugged (power source optimized power config) and LCD brightness drops to the lowest level. I can see what appears to be the LCD backlight flickering (or the refresh rate has gone down). Increasing the brightness by 1 level causes this to go away. It's as if the lowest brightness setting is not providing enough power to the LCD and/or backlight.
I've got a WXGA+ TFT w/ LED BL with the intel built in graphics. All my drivers are up to date as of July 19th 2009. (I think there is one new bios update, but I just updated it less than 1 week ago...)
Wondering if anybody else here has similar experiences. I noticed in when I was working in a dim room, off the power supply.