This also happens to me, and this even happens when suspending to ram.
Sometimes I suspend to ram and at resume I find the logout screen there
again (and I see it close before suspension), other times it just
suspends again right after resume - duplicate "power button" events
should somewhat be discarded by acpid but I am not sure on how.
** Also affects: acpi-support (Ubuntu)
Importance: Undecided
Status: Unconfirmed
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Logout screen appears twice [Feisty]
https://launchpad.net/bugs/81227
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