The default action in Karmic is to suspend on lid close.
** Changed in: gnome-power-manager (Ubuntu)
Status: Triaged => Fix Released
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gnome-power-manager should suspend by default
https://bugs.launchpad.net/bugs/348127
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Thank you for your suggestion. However, the changes you are requesting
aren't really a bug and require more discussion, which should be done on
an appropriate mailing list or forum.
http://www.ubuntu.com/support/community/mailinglists might be a good
start for determining which mailing list to use.