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I am using Ubuntu 12.10. I find that button clicks for Ctrl, Shift and Alt persist for a second or two. That is, if I press A, I get small a. However, if I press Shift, wait for a second and press A, I get a capitalized A. Note I am not pressing Shift and A together to produce the uppercase letter, there's a gap of a second between two presses.

This is very annoying because whenever I am on a page in Firefox and accidentally press Ctrl and scroll down using touchpad it produces zoom out effect and font gets smaller.

Please suggest a remedy.

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up vote 2 down vote accepted

It looks like you enabled some of the "Universal Access" features. In system settings way down you find Universal Access. Select it and then click on the typing tab. Disable all settings in that tab.

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