I have a user with Lat E6430, Win7x64 Pro. When they close the lid to cause it to sleep it will not wake back up. Only solution is the force power off. Updated latest BIOS today (11/26/13) to attempt a fix but no luck. Not sure why this is happening. I've see posts of users with Redhat and Ubuntu complaining of this also. Checked the S3 power setting in the BIOS, but if enabled it appears to disable Intel Rapid Start. Has anyone else seen this and how did you resolve?