This is happening for me as a new regression after upgrading to Karmic. It happens 100% of the time coming back from suspend, and I think also from hibernate.
What seems to be happening is this: the unlock dialog appears on the screen just before the machine suspends, so that dialog thinks too much wall time has expired when the machine wakes up.
A few seconds after the "timeout has expired" message comes up the unlock dialog disappears, leaving the screen blonk, so people may think the machine has failed to resume.
This is happening for me as a new regression after upgrading to Karmic. It happens 100% of the time coming back from suspend, and I think also from hibernate.
What seems to be happening is this: the unlock dialog appears on the screen just before the machine suspends, so that dialog thinks too much wall time has expired when the machine wakes up.
A few seconds after the "timeout has expired" message comes up the unlock dialog disappears, leaving the screen blonk, so people may think the machine has failed to resume.