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If I press the Tab key, it opens a window to shutdown, log off, etc. the computer. The Z key does "undo". The number one key reloads the page. The Esc key acts like Ctrl+Alt+Del. If I try to use any of the keys, it won't work unless I press it quickly multiple times. I don't have any sticky keys enabled under System → Preferences → Assistive Technologies.

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Could you please update your question with the version of Ubuntu you're using and the make/model of your computer? – roadmr Jan 20 '12 at 0:54

Sounds like your CTRL key is stuck (CTRL+Z is normally undo). Try a different keyboard (if on a laptop, try an external one) to see if that works.

Also try cleaning your keyboard.

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Thank you. I just plugged in my USB keyboard, and it worked, is there a way to get the key "unstuck?" – Tony Son Jan 20 '12 at 0:57
The only way to get it unstuck is to clean it. SUCCESS!!! – Tony Son Jan 20 '12 at 2:56

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