16:32:32 received event "ac_adapter ADP1 00000080 00000000"
16:32:32 received event "battery BAT0 00000080 00000001"
16:32:51 received event "button/power PWRF 00000080 00000001"
16:32:52 received event "battery BAT0 00000081 00000001"
Do you remember pressing the PowerButton on the laptop? There's an event coming in, which is the laptop sending a power-button event; 'hald-addon-acpi' then punts this across the D-Bus, which g-p-m then presumbly catches and starts the suspend from.
So... something is making the laptop send a spurious PowerButton press. (Or was that you pressing "POWER" to wake the laptop up again after it had gone to sleep?)
The useful stuff out of that log is:
16:32:32 received event "ac_adapter ADP1 00000080 00000000"
16:32:32 received event "battery BAT0 00000080 00000001"
16:32:51 received event "button/power PWRF 00000080 00000001"
16:32:52 received event "battery BAT0 00000081 00000001"
Do you remember pressing the PowerButton on the laptop? There's an event coming in, which is the laptop sending a power-button event; 'hald-addon-acpi' then punts this across the D-Bus, which g-p-m then presumbly catches and starts the suspend from.
So... something is making the laptop send a spurious PowerButton press. (Or was that you pressing "POWER" to wake the laptop up again after it had gone to sleep?)