One user of Acer Aspire 3810t laptop gets some issues while runs Windows 7 RC1 on it. When battery power is on, it sometimes seems to fluctuate in brightness and contrast automatically. As he thought that maybe there was as option in video card or power settings to save battery power or something, then he’s try to go there but have been unable to find anything. Another problem is the 3810t sometimes goes to sleep long before the time delay for inactivity has passed.
Sounds like it cause of e-power software that trying to save some battery. The solution you can try is reinstall the software and turn off the green leaf. This could makes the 3810t screen will no longer fluctuate but will lose some battery life. Updating all devices with the right drivers for Win7 might be able to fix the problems. After that, you’ll need to changes the Intel graphics settings to “disable power savings”. However, some users facing up these settings reset to default after the 3810t machine shut down. If it so, then you need to disable it again.