Under some conditions, some ThinkPad Calpella models may not properly suspend.
The system appears to enter standby (suspend) or sleep mode, but actually has not. This can be noted by the following symptoms:
The power button / LED are pulsing, indicating that the system is asleep.
The crescent moon indicator is lit, indicating that the system is asleep.
The display and backlight are off.
The fans are spinning, indicating that the system is awake.
The speaker and microphone mute buttons toggle if pressed, indicating that the system is awake.
The ThinkLight can be turned on and off, indicating that the system is awake.
The WLAN and WPAN indicators may be on (if they were on before the suspend operation was initiated they remain on), indicating that the system is awake.
In this state, there appears to be no way to wake the system and in order to recover, the power button must be held down to turn the system off, then powered on again.
Since the system did not fully enter suspend mode, the battery will discharge more quickly than expected if the system is not connected to the AC power adapter because it is actually running rather than truly being suspended.
ThinkPad T410, T410i, T410s, T410si
ThinkPad T510, T510i
ThinkPad W701, W701ds
ThinkPad X201, X201i, X201s, X201 Tablet
This issue is fixed in Intel AMT Management Engine firmware update 22.214.171.1246 and is documented in the readme as:
"(Fix) Fixed an issue that system hung intermittently when entering to suspend mode."
To obtain this fix, update the Intel ME Firmware to the latest version on the web, version 126.96.36.1996 (6ir644ww) or higher.The firmware update can be found at the URL below: