Comment 20 for bug 431146

I could finally understand a way of reproducing this problem.

I have ubuntu maverick, fully updated, with an Intel graphics chipset.

The laptop has the battery attached and is plugged to the power.

After booting, when the computer is idle, the display goes off as it should.
However, if I close the lid and then open it, the display cannot go off anymore when the computer is idle.
The output of the verbose mode is similar to what I described in the previous comment.

This is not the only case in which this problem happens, but it is till now the only one in which I can always reproduce the problem.