loosing keyboard on wakeup from sleep


I love the quick sleep and wake up, but it has a few

Using a PowerBook 2000 model (firewire) 500Mhz.
If I plug in a usb mouse (yes, the puck) I loose all
keyboard response. The mouse and the trackpad both still
work but the keyboard does not respond. Removing the mouse
does not help. Sleep and reawake does not help. Logout
does not help. Only shutdown and restart gets the keyboard

I have also sometimes had this problem after a prolonged
(overnight) sleep with no change to the mouse at all.
Just go to sleep and when awake in the morning, no keyboard.
On my ibook there is no such problems.
maybe it is linked to the powerbook.
The fast sleep wake up mode is really nice