X31 only hibernates when on AC. Stdby only works on battery

[Thinkhead]

A friend's X31 with latest drivers and updates only hibernates when on AC but no stand by as he wants to. Even when forcing via Fn-F4 the laptop hibernates.

Stand by only works when the laptop is running on battery.

Yes, of course, the AC/battery power management profiles in Windows and in IBM power tool are all set up properly. Bios power management is disabled.

Any advice would be appreciated. Thank you.

[davidspalding]

Type CTRL + ALT + DEL, select Shut Down..., and look at each option in the drop list. What d'ya get?

So far as my experience, FN+ F4(?) is standby (suspend), and FN + F12 is hibernate. You wont be able to hibernate if the hibernation option is not enabled on the Hibernation tab of the Power options control panel.