How to debug not working S3?

[Malte Doersam <malte.d-hi6Y0CQ0nG0@public.gmane.org>]

Hi everybody,

I'm curious how you get some usefull information on which point the resume 
might fail.  I'm just trying 2.6-test0 with ACPI revision 20030714 and S1 
works quite fine, but S3 is nasty.

Computer: Thinkpad R31 i810 laptop

if I echo 3 to /proc/acpi/sleep all the processes are moved to the 
refrigerator and the laptop turns itself off. Invoking any acpi-event makes 
the Thinkpad waking up, I hear the harddrive spinning up for like a second 
and then turning off again. After this, the system is kinda dead and must be 
turned off the hard way. (pressing the power button for 4 seconds).

I'd like to gather some information on the problem, which prevents resuming. 
Any hint/note on how to do this?

cheers Malte

P.S. there is a bug on bugzilla filed in the category 'input devices' but is 
probably acpi related: http://bugzilla.kernel.org/show_bug.cgi?id=804



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