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Earlier today I installed the new Kubuntu H on my laptop and had it working (except for wireless). In particular, I had no trouble typing anything in.
Then I left the room for a few minutes and returned to find my cat sitting on the keyboard. I recovered the system as best I could, but the keyboard was dead -- but only in Kubuntu. It works fine in Windows and also when I boot up in choosing the boot kernel. But in Kubuntu, when I type anything in, say, a console, it isn't echoed and produces no visible response. I've tried powering down and powering up again, but that is of no help.
So what might have happened? And how can I get my keyboard back?
Some combination of key presses caused the problem. I've seen odd aftereffects as the result of cats strolling across the keyboard before. In this case, it seems that the keyboard is effectively turn off.
If you are using KDE, try deleting your home .kde folder. If you are using gnome, then delete .gnome and .gnome2. That may get rid of the trapped condition.
If not, you may have to re-install (re-format to be certain the trapped condition doesn't survive the re-install).
If you were logged in as root then delete the named files from /root; is logged in as user, then delete from users home folder.
You could try this: Start the control center (kcontrol). Click on Peripherials -> Keyboard -> Defaults -> Apply.
If that doesn't work try control center -> Regional & Accessibility -> Keyboard Layout -> Defaults -> Apply.
If that doesn't work try control center -> Regional & Accessibility -> Keyboard Shortcuts -> Defaults -> Apply.
Unfortunately I didn't have an icon for kcontrol that I could click on. But from the K menu I got to System Settings and then explored the Accessibility settings. Turned out that something called Use Slow Keys was turned on. I turned it off and the problem was solved.
My kitty may think it's disabled, but it certainly isn't.