05-08-2016 10:06 AM
On my T440S, since BIOS v188.8.131.52 (with little hope that v2.39 would fix it, I installed it to no avail), I can no longer enter hibernation.
When I try to do so, the red LED blinks multiple times and then the computer immediately wakes up.
The event viewer only shows:
The system has returned from a low power state.
Wake Source: Unknown
The workaround is to either unplug all usb devices, or disable USB 3.0 support in the BIOS, which sucks for a 1000e + laptop.
Otherwise, the computer enters a sleep-hibernate-wake up loop which is draining the battery.
When do you plan on releasing an update (BIOS or USB 3.0 driver) to fix this hibernation issue?