I was experiencing a similar problem on a Dell Inspiron 14R (N4010)
since I installed 10.04.  This was the initial install.  The problem I
had was that the system would go into suspend and there was no way to
resume.  Open the lid -- nothing happened.  Hit the keyboard, noting
happened.  Move the mouse, nothing happened.  Push the resume button ---
nothing happened.

However, I do have a workaround that makes the suspend/resume cycle work
correctly.  I added the atkbd.reset parameter to my kernel, and I now do
not have any troubles with the suspend/resume cycle.  To do this, I
edited my /etc/default/grub and added the atkbd.reset parameter to my
default_linux load line right next to "quiet splash".  The is ran a sudo
update-grub and I have not had any problem with resume or the FN keys.

Bruce

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Special function keys and lid events don't work after first suspend/resume
https://bugs.launchpad.net/bugs/657338
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