Ultra-Thin

[petermaple]

Hi.
I bought a S7 392 in hongkong last month and replace a crucial m550 SSD after i bought it. I reinstall the windows 8.1 by MSDN disk and upgrade it to update 1. everything went fine, until...

I found that when i use the battery and the S7 become idle afterwhile. then the screen turn off as it config in the power option. after a short time, serveral second I think, the power led die out and the S7 shut down. I turn on the S7 the system log tells methat's an abnormal shut down due to power shut down or system crash.

this also happened when I use Fn＋R to turn off the screen. this wouldn't happen when I use the AC power.

I try to.uninstall the intel video driver and this will not happen when use the default Microsoft video driver. but any intel video driver from the Acer or intel official won't solve the problem.

can anyone tells me what's going on? thanks!