I have a new Lenovo X250 running Windows 8.1 Pro, attached to a Windows domain.

If I put the laptop in Sleep mode (whether by the button or by the Start menu), then after about 3 hours the laptop appears to shut down. Pressing the laptop power button starts a boot sequence. This happens even if the laptop is plugged into the electricity.

I made sure all power settings were set to default, and the Power Troubleshooter found no problems.

I spoke with Lenovo support. They said an old fingerprint reader might be causing this, so they told me first to try remiving the driver and seeing what happens. Removing the driver did not help.

I ran "powercfg.exe -energy", and got this response:

"Platform Power Management Capabilities:PCI Express Active-State Power Management (ASPM) Disabled
PCI Express Active-State Power Management (ASPM) has been disabled due to a known incompatibility with the hardware in this computer."

How should I proceed?

regards,

mlavie

• Edited by mlavie Tuesday, June 16, 2015 9:14 PM

Hi S. Sengupta,

Thank you for your response.

If I am not mistaken, you told me to select Link State Power Management and click OK to save the changes, but did not tell me which changes to make.

Am I correct?

TIA,

Lavie 

• Edited by mlavie Tuesday, June 16, 2015 7:43 PM

Too make a long story short, this is not a bug. This is apparently the "correct" default behavior - it's just that I wasn't expecting it. The advanced settings clearly show that the machine should hibernate after 180 mins in sleep.

mlavie

• Marked as answer by mlavie 15 hours 50 minutes ago