It's not standby. It's sleep mode. Not all hardware supports a sleep mode, including your Thinkpad.
On my girlfriends laptop (HP) it's possible to resume it from standby, just by pressing any button on the keyboard, or tapping the mousepad. On my IBM thinkpad however this doesn't work, why?
As i can resume the HP this way, I can also resume it by tapping my Lilliput touchscreen.
This was my idea for the IBM also, but I can't figure out where to activate this function.
Anyone who knows? (Guess it's quite easy...)
And by the way, my old desktop pc from 1998 supports this function too.
I had the same issue, I was able to fix it with a simple fix. You have to enable power management features for your USB devices. Let me find the key you have to add, and I'll post it for you.