Just got a new Vaio (VPCS13L9E) with Windows 7 Professional on it. I've noticed intermittently the brightness will go up and down all by itself! I've checked the power management and the brightness settings there. My brightness keys using the FN button work ok too. It does not seem to be affected by having the power cord plugged in either. Has anyone else had this problem? I've only had the laptop since just before Christmas! Thanks.
