Comment 6 for bug 191185

Isen't it great how well documented the whole suspend thingy is?

Here is how I think this whole thing works:

hal is triggered and runs /usr/lib/hal/scripts/linux/hal-system-power-suspend-linux

That script in turn runs /usr/sbin/pm-suspend. That script basically parses the arguments it got from hal and calls functions stored in /usr/lib/pm-utils/functions, triggering pm_main there.

pm_main in turn calls the run_hooks function. That will run files found in /etc/pm/sleep.d/ and /usr/lib/pm-utils/sleep.d/ and will run them in order (which is imposed by sort). /usr/lib/pm-utils/sleep.d/50modules is responsible to load/unload modules. It removes all modules found in the SUSPEND_MODULES variable.

This variable is set in /usr/lib/pm-utils/functions, being initialized to "". /usr/lib/pm-utils/defaults is then sourced and can be used to override the value.

I am not sure whether /etc/default/acpi-support still works or not: in /usr/lib/pm-utils/functions the suspend is triggered by writing "mem" into the proper sysfs file... that might or might not trigger acpi-suspend to work its magic. It would be great,

So I added ath_pci into /usr/lib/pm-utils/defaults now... not sure whether this works as I currently can not test this;-)