I'm experiencing a very annoying problem on my T400 with Win XP Professional SP3: around 75% of the time, when I wake up my T400 from standby mode, the mouse and keyboard don't work. Actually what happens is one of these situations:
1) Neither keyboard nor mouse (stick and pad) respond - Ctrl-Alt-Del to enter username/password is not registered, I can't log into Windows
2) Keyboard works (I can log into windows) but mouse doesn't respond
I have to close the laptop to standby and re-open, repeatedly, until it finally works. Though one interesting aspect is that if I have external USB keyboard and mouse plugged in, they always work.
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