Suspend problem when laptop lid closed

[Nicolas Pernetty <nicopernetty@yahoo.fr>]

Hello,

I am using Debian Testing on my laptop (Dell Latitude E6410) and an
update a few days ago (I am updating every month) broke the suspend
when I am closing the lid of my laptop.

I suspect ACPI, gnome-power-manager or upower but couldn't find the
culprit. When it is not working, nothing is logged
into /var/log/pm-suspend.log.

Here are the symptoms:

1) I am logged into Gnome
2) I close the lid -> suspend OK
3) I open the lid -> resume OK
4) I close the lid -> nothing happens
5) I log out of Gnome and arrive at gdm connection screen
6) I close the lid -> suspend OK
7) I open the lid -> resume OK
8) I close the lid -> nothing happens
9) I log in Gnome
10) Back to step 1

I know that the ACPI event is correctly detected (with acpi_listen I
see LID Close each time) but I don't know how to debug this further.

Can someone help be debug this ?

Thanks