From <https://bugs.edge.launchpad.net/ubuntu/jaunty/+source/gnome-power-manager/+bug/306310/comments/42>
As of today's Jaunty updates, I'm getting one additional suspend
cycle, and after coming back from suspend I experienced this behaviour
which I'm assuming is related:
After pressing Fn a second time to wake up, I got the gnome screen
lock dialog. I tried to type into it but I didn't see anything when I
pressed keys. Ctrl-Alt-F1 to switch to a text console didn't work.
However, the mouse did still respond, and I could click Cancel to
remove the dialog. When I clicked the mouse, it came back, and I still
couldn't type.
I then pressed Switch user, and got a login screen which _did_ respond
to keyboard input. I typed in my username and password, and it
returned me to my original desktop. However, the keyboard is still
not working in any application.
By sshing in I can see there is a traceback (not an oops?) in the
kernel log, see attached to the original bug.
After I logged out of my gnome session, the keyboard worked ok at the login screen and in the next session.
I suspended the machine again and I did get the double-resume, but I did not have trouble with my keyboard on this attempt.
I can confirm this, appeared at some point during jaunty and same symptoms (switch user -> login -> logout -> login works).
Are you using Aspire One as well, btw?